Available RV resorts in Florida

Grand Lake Resort between Ocala and Gainesville.

Wilderness RV Resort near Ocala.

Wekiva Falls RV resort north Orlando.

Rock Crusher Crystal River fills up but I bet you can get in now.

the good ones in the warmer half of Florida fill up fast. Seems to me the East coast before the West.
Find a couple you really like and call. Get put on a waiting list in case someone cancels.
Fiesta key in the florida keys has availability for jan 15 - feb 7

For the past several years plenty of spaces were empty in North Beach Camp Resort in St. Augustine FL in January and February. Keep in mind it is considerably cooler there than in southern Fla. That said .... the campground has large sites with vegetation; the Atlantic is on one end, and the IntraCoastal Waterway on the other; three good restaurants within walking distance; plenty of sightseeing opportunities; and gets good reviews on www.rvparkreviews.com Camp on!