I live in Lake City and we have some very nice state parks just a few miles off 75.
Stephen Foster (not to be confused with the one in GA) is usually easy to get reservations at and has quite a few nice, big pull through sites so you don't have to unhook. It's 3 miles off 75.
O'leno State Park is a bit more difficult to get reservations. Once again, just off 75. They don't have any pull through sites, and the Dogwood Loop is a bit tight. Magnolia Loop is much bigger for larger RVs and level.
Paynes Prairie is in Gainesville, also just a few miles off 75. I've only camped there once, so can't remember the loop names or if there are pull through sites.
All of our state parks will take reservations up to 11 months in advance. Late arrivals are not a problem, just call and get the gate code.
Even for an overnight, I would rather stay at any of these than the "field" RV parks. Cheaper, nicer, and more safe - in my opinion.
