Mounts are beautiful and impressive and will give you years of memories of that special trip to Boca Grande Pass. An alternative to killing a tarpon for mounting is to have a fiberglass replica mount made. In fact, very, very few anglers keep tarpon for mounting these days. Your captain can look at the tarpon prior to release and come very close to estimating weight and length. Charter rates generally vary according to the captain and the size of his vessel.
Larger boats are usually more expensive to operate but do offer comfort and personal facilities.
Do not confuse the size of the boat with the fishing ability of a captain. Smaller boats offer better maneuverability and quieter operation while larger boats offer comfort and room. The rate is for a boat with the captain, tackle and bait. Generally there is no other charge other than whatever gratuity you feel is appropriate. There is no need for individual fishing licenses as you are covered by your captain's Florida saltwater charter license.