Went to an OHV riding area just outside Appleton, MN this weekend. Located in an old gravel pit with lots of trails from mud to sand, hills, jumps, and technical challenges! No fee for riding but your atv must be registered in the state you reside in. We need to get an open weekend and go up there with a big group! Not sure on camping but they have picnic shelters and porta potties on site. Also trails are marked but there are trails designated for jeeps and pickups that the atv's are supposed to stay off.