Florida State Parks are the BEST
We are Florida residents, try to camp one long weekend every month (for now) so we have not covered a lot of ground but we are working on it!
We are regulars at Fort Desoto (can only book 6 months in advance, local residents get first shot 7 months out) but you can usually find a site easily during the week and we adore our state parks but those also must be booked in advance (11 months max) this time of year due to the snowbird influx & the fantastic pricing. Both of these are short term dump station situations.
We have just returned from 4 days in a private park in Fort Meyers where it seems all the sites in most of the parks are incredibly small regardless of the campground you pick (one snowbird referred to it as fender bender city within the campground as there had been 3 fender benders in less than a week ...that week). We finished with 3 days in state park where I believe we were the only campers in with 50 sites of snowbirds ... but there was plenty of joyful space to be had.
Camping since May 2013 .... FL & GA only so far .... loving it!