I'm also in Moline, have yet to find a place around here though. I've heard of a couple places but not sure how legit they are. The Cliffs Insane Terrain might be the closest with Badlands not being far behind that.
Im 98% sure im getting my first jeep this saturday. 06' TJ. lived around the QC area my whole life (23 years old) all over back roads and the like and really there is not many "trails" anywhere if you can find someone with a piece of land they would be willing to let you traverse that'd be the closest thing ive found thats legal. also my girl friend watches the president (at least i think he is) of the QC Jeepers clubs kids. after I get mine I wouldnt mind talking to him and see what the club is all about found a website for it : QC 4X4 CLUB