gramma,
Folks here tend to use one of three rental companies. None of them rent RVs in the true sense of the word (a Class A with a motor). These folks rent various trailers.
1. Fort Camper Rental rents popups. This is the cheapest way to rent at the Fort. I have a popup and when it says it can sleep 6, for example, it probably can but there wouldn't be room for much else. Expect to only sleep inside.
2. Greenberg RV rents travel trailers and 5th wheels. These are a little bigger and have solid walls and a roof that the popups don't More expensive, though.
3. Florida Camper Rental rents 5th wheels, travel trailers, and hybrids.
The websites for these folks aren't hard to find and use our Forum Search tool to look for comments about them. I've never used any of them since I have my own camper so I only know what I read here. As far as what they provide, check their websites and call to ask. Can't hurt, can it?
Bama Ed