There aren't really any good places to 4wheel around here. You best bets closest bets are
Other assorted two tracks up north - but you better know the law or you'll get ticketed.
As far as other places to wheel that are further away
Drummond Island and Turtle Ridge
The Badlands (Indiana)
Wellsville/Forbidden Zone (Ohio)
There are a couple other parks that I've heard of but not positive on their names like
Crazy Acres (might be the same as Haspin)
and a couple others that I can't think of now.