I'm just North of Tampa Bay.
State Campgrounds from Jax. down the East coast to the Keys. Had a great time! No reservations in advance (you can never get a site) just went one two days out with Reserve America or showed up and put on the puppy dog eyes! Impossible to stealth camp in the keys IMO. Their really on it down there. That, plus two big dogs and a need for AC put us in the campground. We did hook up with some fellow travelers in a VW bus and shared sites for two weeks. In Bahia Honda MM30 we were told that only one vehicle per site in Florida State Campgrounds.
Everywhere else it was no issue and really even encouraged! But that's the written rule.
Curry Hammock in Marathon highly recommended! Best beach prob. Gamble Rogers in Flagler Beach.
You planning travels in FLorida?
Sent by wing, prayer & ATT