Karl, I'm not 100% sure about the tire size and track width in the national forest compared to a WMA, but at claiborne they have iron railings to enter the trails from the parking area and I can't fit throught cut outs in the railing with my bike. There is a way around them, but you risk getting a ticket if you do. The dunes "LA DUNES" is close to this area, but not the same place. At the dunes it cost 20 buck per bike and you have to have a flag, which can be purchased there for 15 bucks, you don't have to wear a helmet at either place but I would suggest it. There aren't many bad holes at the dunes, but they do have a creek that you can ride in that is fun.