We recently spent 4-days camping in Colt Creek State Park just outside of Lakeland, Fl. It was a wonderful stay and an awesome camping area. They only have spots for 34 RV campers, but do have a very nice tent camping area. It is wide open with not much shade but luckily the weather was not bad and we actually turned the heat on one night.
We met up with 7 other friends and enjoyed some interesting 'night' hiking in the brushy areas. If you are in the area it is definitely worth a visit. Oh, if you have horses, they are horse friendly with trails and camping.