If any of you get up to South Dakota I recommend hitting up Farmingdale. It's about 15miles south of the New Underwood Exit. There's no campground or bathrooms but most people just pull a camper or throw a tent up in the parkinglot. One side is all hilly grasslands and the other side is badlands. You can ride for miles and miles and there's hills you wouldn't think of trying to climb. If it rains out there it's not worth going though, gets almost unrideable. Don't know how to post pics or I'd throw some up.

Here are some pics from a trip we took up there a few yrs ago.

http://www.southdakotaatv.net/index.php/topic,16.msg27.html#msg27

I have some friends going to SD for a week on friday. They're camping outside of deadwood, looks to be close to where you where. I'll go through their pics and hopefully if they like it I try it next time. They planned on Colorado, but have been snowed out. Figured SD would be safer spring trips from here out.