Many dealers consider the reservation deposit as the security deposit. Dealers will refund the security fee to you after inspecting the returned unit. Any charges for damage to the unit or special fees such as holding tank fees or cleaning fees are paid at that time. Most independents do not charge for using generators or microwave units. For propane usage, most dealers only charge you to refill the amount of propane you use.
Insurance is another cost to consider.
If Allstate carries the insurance on your car, they provide coverage on the RV rental at no additional cost. When leasing from dealers, your own personal insurance acts as secondary insurance. There are certain damages regarded as negligence by the RV insurance company. For these, you may be responsible for the total amount unless you take collision insurance covering, for example, anything above the windshield or on the undercarriage. Again check with your automobile insurance company to check your current coverage.