<PAGE>

                                                                    EXHIBIT 10.8

                                 AMENDMENT TO
                              DEBT CONVERSION AND
                    MUTUAL SETTLEMENT AND RELEASE AGREEMENT

     This Amendment to Debt Conversion and Mutual Settlement and Release
Agreement (the "Amendment to Release Agreement") is made and entered into as of
the 13th day of June 2001 (the "Amendment Effective Date") between Holiday RV
Superstores, Inc., a Delaware corporation ("Holiday RV") and County Line Select
Cars, Inc., a Florida corporation ("County Line" and collectively with Holiday
RV, the "Holiday RV Group"), and Armando Alonso, an individual ("Armando") and
Francisco Alonso, an individual ("Francisco" and collectively with Armando, the
"Investor Group").

                             W I T N E S S E T H:

     Whereas, Holiday RV, County Line, Armando and Francisco have previously
entered into that certain Debt Conversion and Mutual Settlement and Release
Agreement effective as of March 1, 2001 (the "Release Agreement"); and

     Whereas, Holiday RV, County Line, Armando and Francisco now desire to amend
the Release Agreement as set forth below.

     Now, Therefore, in consideration of the premises and of the mutual
covenants and agreements contained herein, and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, and
intending to be legally bound hereby, the parties hereto hereby agree as
follows:

     1.   Defined Terms. Unless otherwise defined herein, capitalized terms used
          -------------
herein shall have the meanings, if any, assigned to them in the Release
Agreement.

     2.   Amendments to the Release Agreement.
          -----------------------------------

          (a)  The "Effective Date" of the Release Agreement is deemed to be
April 9, 2001.

          (b)  Section 1.2 shall be amended and restated in its entirety to read
               -----------
as follows:

          1.2    "Note Conversion" means the conversion of (i) indebtedness in
     the original principal amount of $1,500,000, excluding any accrued but
     unpaid interest (which is the entire principal amount Holiday RV and the
     Investor Group have agreed is due and payable pursuant to the Stock
     Purchase Agreement and the Purchase Notes), into four hundred twelve
     thousand (412,000) shares of Common Stock (the "Conversion Shares") at a
     price per share of $3.05 and a $60,000 merchandise credit, and (ii) the
     conversion of any accrued but unpaid interest on the above referenced
     indebtedness into a release of a receivable in the approximate amount of
     $42,000 relating to excess prepaid rent paid by Holiday RV to the Investor
     Group.
<PAGE>

          (c)  The first paragraph of Section 4 shall be amended and restated in
                                      ---------
its entirety to read as follows:

          4.   Lock-Up.  Subject to Section 4.2, below, the Investor Group
                                    -----------
     agrees that they will not, without Holiday RV's prior written consent,
     offer, sell, transfer, pledge, hypothecate, contract to sell, grant any
     option for the sale of the Conversion Shares or otherwise dispose of
     (collectively, a "Transfer"), directly or indirectly, any Conversion Shares
     beginning on the Effective Date and ending on March 1, 2002.

          (d)  The first legend contained in Section 4.1 shall be amended and
                                             -----------
restated in its entirety to read as follows:

          THE SECURITIES REPRESENTED BY THIS CERTIFICATE MAY NOT BE SOLD,
          TRANSFERRED, ASSIGNED, DISPOSED OF, LOANED, OR HYPOTHECATED EXCEPT IN
          ACCORDANCE WITH THE TERMS OF THE DEBT CONVERSION AND SETTLEMENT
          AGREEMENT DATED AS OF MARCH 1, 2001 , AS AMENDED BY THAT AMENDMENT TO
          DEBT CONVERSION AND SETTLEMENT AGREEMENT DATED AS OF JUNE 12, 2001
          (COLLECTIVELY, THE "CONVERSION AGREEMENT") BETWEEN THE COMPANY AND THE
          OTHER PARTIES NAMED THEREIN.  A TRUE AND CORRECT COPY OF THE
          CONVERSION AGREEMENT IS AVAILABLE FROM THE COMPANY UPON REQUEST.

          (e)  Section 4.2 shall be amended and restated in its entirety to read
               -----------
as follows:

               4.2  Permitted Dispositions.  Subject to compliance with
     Sections 4.3 and 5 below, (i) on the Effective Date each member of the
     ------------     -
     Investor Group shall be permitted to effect Transfers of the Conversion
     Shares (a "Permitted Disposition") with regard to 2/12th of the number of
     initial Conversion Shares issued to such member of the Investor Group, and
     (ii) upon the first business day of each of the 10 calendar months
     following the Effective Date, each member of the Investor Group shall be
     permitted to effect Permitted Dispositions with regard to an additional
     1/12th of the number of initial Conversion Shares issued to such member of
     the Investor Group.  By way of example, and assuming no prior Permitted
     Dispositions, on July 1, 2001 and December 1, 2001, each member of the
     Investor Group shall be entitled to Transfer an aggregate of 5/12ths and
     5/6ths, respectively, of the initial Conversion Shares issued to such
     individual, subject to compliance with the procedures set forth in Section
                                                                        -------
     5, below.
     -

          (f)  Section 4.3 shall be amended and restated in its entirety to read
               -----------
as follows:

               4.3  Purchase Option. In the event any member of the Investor
     Group (the "Selling Member") desires to sell his Conversion Shares pursuant
     to a Permitted Disposition, then as a condition precedent to such Permitted

                                       2
<PAGE>

     Disposition the Selling Member shall provide notice as set forth in
     Attachment A to this Amendment (the "Sale Notice") to Holiday RV of such
     intent describing the amount of Conversion Shares proposed to be sold in
     such Permitted Disposition. Thereafter, Holiday RV shall have the right
     (the "Purchase Right"), exerisable at any time during the three trading
     days after receipt of the Sale Notice (the "Purchase Period"), to purchase
     such Conversion Shares at a per share price equal to the arithmetic mean of
     the closing price, as reported by Bloomberg, L.P., of shares of Common
     Stock for the five consecutive trading days preceeding the date Holiday RV
     exercises the Purchase Right. If, prior to the opening of the Nasdaq Stock
     Market on the first trading day after the end of the Purchase Period
     Holiday RV has not exercised its Purchase Right, then the Selling Member
     may sell the Conversion Shares listed on the Sale Notice.

          (g)  Section 5 shall be amended and restated in its entirety to read
               ---------
     as follows:

               5.   Restricted Securities; Registration. The Investor Group
     agrees and acknowledges that the Conversion Shares are "restricted
     securities" within the meaning of Rule 144 under the Securities Act of
     1933, as amended (the "Act"), and may not be resold or transferred without
     registration under the Act and applicable state securities laws or an
     exception from such registration. Holiday RV agrees to file a registration
     statement under the Act covering the Conversion Shares as promptly as
     practicable after the Amendment Effective Date and will use commercially
     reasonable efforts to cause such registration statement to be declared
     effective by the Securities and Exchange Commission no later than the 45th
     day following the Amendment Effective Date. Holiday RV shall not be
     required to maintain the effectiveness of such registration statement after
     any of the Conversion Shares may be resold pursuant to Rule 144(k) under
     the Act.

               Notwithstanding anything to the contrary herein, Holiday RV
     covenants and agrees that it shall file the registration statement
     contemplated in this Section 5 by June 29, 2001.  In addition,
                          ---------
     notwithstanding anything to the contrary herein, Holiday RV covenants and
     agrees that said registration statement shall be declared effective by the
     Securities Exchange Commission by September 12, 2001.

          (h)  Section 7.8 shall be amended and restated in its entirety to read
               -----------
as follows:

               7.8  [Intentionally Deleted].

     3.   Miscellaneous.
          -------------

          (a)  Except as expressly amended or waived herein, all terms,
covenants and provisions of the Release Agreement shall remain in full force and
effect and each of the terms of Section 10 of the Release Agreement is
                                ----------
incorporated herein by this reference, mutatis mutandis.

                                       3
<PAGE>

          (b)  This Amendment to Release Agreement shall be binding upon and
inure to the benefit of the parties hereto and their successors, assigns, heirs,
executors and administrators.

          (c)  This Amendment to Release Agreement shall be governed by and
construed under the laws of the State of Florida without regard to the State's
conflict of law rules.

          (d)  This Amendment to Release Agreement, together with the Release
Agreement, as amended, constitutes the full and entire understanding and
agreement among the parties with regard to the subjects hereof and thereof.

          (e)  This Amendment to Release Agreement may be executed in one or
more counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument. A telecopy or facsimile
transmission of a signed counterpart of this Amendment shall be sufficient to
bind the party or parties whose signature(s) appear(s) hereon.

    [The remainder of this page is intentionally left blank, signature page
                                   follows.]

                                       4
<PAGE>

     In Witness Whereof, the parties hereto have duly executed this Amendment to
Release Agreement as of the date first above written.

                                  HOLIDAY RV SUPERSTORES, INC.


                                  By: ________________________________
                                         Michael S. Riley
                                         Chief Executive Officer


                                  COUNTY LINE SELECT CARS, INC.


                                  By: ________________________________
                                         Michael S. Riley
                                         Chief Executive Officer


                                  ___________________________________
                                  Armando Alonso


                                  ___________________________________
                                  Francisco Alonso

                                       5
<PAGE>

                                 ATTACHMENT A

                                  SALE NOTICE
                                  -----------



To:   Holiday RV Superstores, Inc. ("Holiday")
Attn: President

(1)   Pursuant to Section 4.3 of the Debt Conversion and Mutual Settlement and
Release Agreement dated March 1, 2001, between Holiday, County Line Select Cars,
Inc., Armando Alonso, and Francisco Alonso, as amended by that Amendment to Debt
Conversion and Mutual Settlement and Release Agreement dated June 13, 2001
(collectively, the "Conversion Agreement"), the undersigned hereby gives notice
of his election to sell _______ shares (the "Shares") of Common Stock of
Holiday.

(2)   Pursuant to Section 4.3 of the Conversion Agreement, Holiday may purchase,
for a period of three trading days subsequent to the date of receipt of this
notice (the "Purchase Right") the Shares at a per share purchase price equal to
the arithmetic mean of the closing price, as reported by Bloomberg, L.P., of
shares of Common Stock for the five consecutive trading days preceeding the date
Holiday exercises the Purchase Right.

(3)   You may provide me with notice of exercise of the Purchase Right at the
phone number and address specified below:


                                  __________________________________
                                  (Name)

                                  __________________________________
                                  (Address)
                                  __________________________________
                                  Phone:______________________
                                  Fax:  ______________________



Dated: _______________


_____________________________________
Signature

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