you should NOW be researching for and planning on the 2022-2023 season...
FL State parks are the most cost-efficient campgrounds and they are abundant but reservations fill up 11 months to the day of arrival.
The few FEDERAL campsite locations, mostly off of Rt 41 near/around Big Cypress and the Everglades fill up 6 months in advance because of a shorter reservation window.
Some of the FL State forest campgrounds are little used, but most do not offer electric.
There are MORE beach side campgrounds in the panhandle area that are very nice if you can handle 50-60 degree weather in the winter months but again these fill up.
Finally Gulf SHores in AL has many sites near the beach.
Private campgrounds also fill up routinely within 6-9 months of winter dates.
Inland campsite MIGHT be available for a night or two here and there, but all long reservations are long gone.
"nothing can now be believed which is seen in a newspaper. Truth itself becomes suspicious by being put into that polluted vehicle."
Thomas Jefferson to John Norvell pg. 2, June 11, 1807
2014 Shamrock 183
2014 RAM 1500 Bighorn Crew Cab, HEMI, 3.21 gears, 8 Spd, 4X4 TST TPMS