Back when we started going to Fl the problem of a quality site required much advance notice. That said we have always had a TT and as time went on we now have a very long trail and our set up is longer than a class A. That said many and I mean many of the RV site in Fl are old and short with no 50 amp service.
I can recommend the park we stay at that is near the villages and 45 minutes fro Orlando. They have a bunch of new sites this year and you may find a spot at this late date, Olde Mill Stream great place, super clean, great people and free ice, free beer at their dances (free) and entrainment ($10.). Class A's welcome and the rates are far less then south of the big lake.