Brown Mtn. is awesome for atv/utv's. I probably wouldn't take my 4x4 up there though. Not really too many challenges when I was up there last. Unless some drastic changes were made, its more of an atv trail system. Never been to URE, so can't help you out there. If you do want to try Brown Mtn though, there is only a couple places to pay. One is past the trail head a few miles (coming from Morganton side) at a BP gas station. People kept breaking into the honor system box and stealing the money so they don't sell passes in the trails anymore.