i'm not aware of anything currently going on like that, but you could defiantly do something like that in Ocala National Forest, or Withlacoochee WMA. both places offer camping and hiking. in Withlacoochee there are caves to explore as well, and Ocala there are places to canoe and springs to swim in. sometimes i spend a whole weekend in Ocala NF and camp and wheel.
if your on Facebook, come join Florida Family 4x4 those are the types of rides we set up.
Build - http://www.jeepforum.com/forum/f197/4x4jeeps-build-thread-1341031