The easiest and best kept place would be Prentice cooper state park. I would check to see when they're open as it closes during the winter and for other periods of time for turkey hunting. If the park is open, it has some great views and very easy trails. The only challenging trail there is Haley road and even that trail is easy enough for a stock TJ.
Another place right down the road from prebtice cooper is Big Fork. This place is a mix of public roads and private land. I wouldn't suggest going alone as it gives off a weird vibe. But this place has a mix of everything. It has nice rocks to play on, tight trails, and places where backing out isn't really an option. There's even mud holes that come up to the hood, ask me how I know...
The non free option is Adventure Offroad. Its an offroad park that ranges from that's easy to holy shit, nope not doing that.
Also, swing by Tom's 4x4 superstore. Has some useful stuff and knowledgeable people.
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