We have stayed at Paynes Prairie State Preserve quite a few times and it is always a favorite. It is one of the lesser priced Florida State Parks. You can bike the parks roads or walk to the prairie viewing platform and back from the campground.
This time and most other times we were there to participate in Santa Fe Spring Arts Festival in Gainesville....a very nice festival of arts...well juried and a quality event.
Our favorite restaurant or pizza joint is Blue Highway Pizza...It is just south out of the park on route 441 and maybe a mile or so. There pizza is fabulous and the place is small. It seems to always have a line to get in or nearly so no matter what time of day you go. http://bluehighwaypizza.com/ They also have a gluten free pizza dough now...whoopee! Ask for their punch card...purchase 10 pizza and one is on them...even more reason to go eat.