We're seriously contemplating a move to Lakeland, FL. Know summers are a bit on the toasty size, but what is a reasonable amount of the year when you can comfortably camp. We have several side-issue...
As others have said, October to May are the best months. The summer months are warm. Just make sure your campsite is in the shade and use the A/C. So it is relay a matter of just how much you want to camp.
That is the great thing about Florida life. Our sports are year round.
By the way, the first summer you live in Florida will be the worst as your body adjusts. Year two on will get easier.