More than likely they would rent from Cruise America, in the US it's the most popular for RV rentals. For a large RV that sleeps 7 cost for 5 nights $2214 aprox... slightly cheaper if you bring own towels, sheets etc...I added everything (miles over
500 would be $0.35 per mile...they have location in jacksonville
RV would be similar to
A large 30', traditional motorhome with the self-contained features including a generator. This economical family unit is a traditional favorite with walk-through convenience.
www.cruiseamerica.com
And depending on the state based on type/weight of RV/Motorhome you would need a license for a behemoth one (florida doesn't require one but some surrounding states do)
A comprehensive state-by-state guide to RV license requirements. Find out if you need a commercial or a special driver's license in your state. Most states don't require a special license to drive an RV, camper or motorhome. This list covers all the exceptions.
www.campanda.com
Sorry for long post, bored cranky and tired