Haspin Acres is a couple of hours south (near Laurel, IN). A few hours more will put you at Redbird SRA, south of Terre Haute.
Once you get in with the locals, weekend fun can be found in a nearby farmers field, or woods. Don't expect to find anything in the way of rocks though, around those parts mud rules the day.
There used to be some interesting trails along the river in nearby Ridgeville, IN. I do not know if they are still accessible though.
There are a few clubs, mostly in the central and southern part of the state. I used to run with most of these guys back in the day. Here is a listing. It may be a little old.
As for the area, it's definitely a farming community. Expect to see lots of corn.
'76 CJ-7, '43 CJ-2a, '78 Bronco,'78 CJ-7, '75 CJ-5, '78 CJ-7, '80 CJ-7, '78 SJ, '79 SJ, '78 and a '76 FJ-40 , '90 XJ, '91 XJ, '86 CJ-7, '95 ZJ, '68 CJ-101 Commando, '00 TJ, '68 M-715, 2 '86 Military Blazers, '96 LR Discovery, '86 CJ-7, '91 YJ, '99 TJ, 07' JKU Rubi, 1988 YJ, 1973 Commando, 3 Diesel Excursions....
Now back to a 2013 JKU Rubicon with "stuff", planning 37's with minimal lift.
I've tried them all... Jeeps are still the best. (0||||0)