going to Florida in jan

Some places will require a year in advance. You should be able to find campgrounds if you don't require 5 star camping. Better campgrounds fill up first; in my opinion. Location means everything. The further south you travel the more expensive it tends to be. Some folks prefer the west coast to the east coast. The middle of the state tends to be less expensive; Either coast is more expensive than the middle. We've been doing this over a dozen years and we still haven't found shangri la, but we're still looking. Some claim to be resorts....but; we use rvparkreviews.com when searching for campgrounds. You have to read several reviews for any campgrounds to filter comments.I would start early and pick an area to explore and either wing it or make advance reservations this year and explore to see if it fits your wants and needs.