WOW im jealous, that would be a WICKED mudder, only problem is with the dually's they get stuck easier cause if you go to slow threw the mud it will get stuck between the dual tires and causes more suction so they get stuck real good. Just keep them wheels spinin fast and you'll be fine though. But 12 inches that is wicked and 36 tires wow gunna need a ladder to get into it, mine has 4 inch and thats way more then enough. Dont want it too high since i mostly do 4x4.