You can ride and camp at Alafia River State Park in Lithia (about 15 minutes south of Plant City). Good sites...easy trailer access. Use that as base camp and you can haul to four other state parks close by. (The park/camp has 4000+ acres of great riding - varying terrain). Nearby is Old Welcome Road - (can't camp there) but it has 3000+ acres of riding - (five minute trailer ride from Alafia) Alafia River State Park - 14326 South CR 39 Lithia, FL 33547 (813) 672 5320 / www.floridastateparks.org/alafiariver/
Lots of places...if you plan to make a trip just drop me a line and I'll meet up with you.
My absolute favorite is the Osceola County Wagon Train and Trail Ride www.ocwttr.org whiich is a seven day ride and camp (usually about 400 people) in Central Florida - riding on private ranch land - I recommend buying the meals - they are great and inexpensive. The ride itself is less than $100 - the food is about $200 for seven days 3x day - worth every penny. It is Feb 26th - March 5th 2010 Nice relaxed pace...you can ride the morning ride (3HRS) or the afternoon ride (3 hrs or so) or both. Most people ride both. One day is an all day ride (7+ hrs) and they bring your lunch out to you on the trail. If you're interested in going - register early - they limit the number of riders and it fills up fast. Registration packets aren't out yet.
Happy Trails