I will concur about Uwharrie, it's an adult playground. You can camp, backpack, hike, go off-roading, ride horses, hunt, use the shooting range. I've been out there a bunch, I've been on most of the trails with my XJ, plan on completing them all with the Bronco. The XJ is still on 31's and the locker isn't wired up yet.
If you're out west there are tons of fire roads but specifically look at Hurricane Creek Road.
Croatan is flat gravel road, better for driving the bronco out there, jumping on a gravel bike and crushing trails looking for alligators.