Interesting discussion, and I have something relevant to add. I've been heading north to ride for many years, and Eagle River area, Vilas Cty. for the last 6 - 7. My young son, he's 12 now rides a 90 CC Yam dirt bike around my property, in the ditches and occasionally would run down to the snow trail, with me on a mountain bike. Then eventually he started running down to the trail by himself. I never thought much of it, and never dreamed this could be some violation, until one day last summer when he was escorted home, in a county squad car, this is an 11 yr. old kid at the time mind you. Cop was a real jerk, like the kid was some renegade dirt biker tearing up the land. Left the dirt bike on the trail about a mile away, would not let the kid ride it home, and made me run down with the trailer to get the bike. Times are changing in northern WI and I would not be surprised if some time soon our trail access will be severly diminished or threatened completely. Completely ridiculous that it has come to this, and just wait until all the resorts and businesses that have to close in the winter start going belly-up because they can't make enough money in the 4 - 5 month summer to survive. Strange times, but then again it could be alot of people tearing up land with 4-wheelers and sleds are wearing patience of property owners, very thin.