What national forest are you talking about? Although I haven't camped there yet, I know there are plenty of places to camp in the Ocala NF. I'd also check out Welcome to Florida State Parks to see some of the state parks.
If you like to be by the water, there are a few nice state parks in the St. Augustine and one in Ormond Beach. As soon as it warms up a bit and hunting season ends, I'll probably try to take the Jeep to Ocala NF and camp for a few days.
I'm on there as "joshua.craft@ff" and I can't change my screen name. I'm going to email one of the moderators to see if I can have it changed. I never really post over there because I really don't know what I'm talking about when it comes to Jeeps. I have a stock '05 Wrangler and am looking to make some mods in the future, but nothing too serious.