Baldwin is a Great area to two track and enjoy the outdoors, if you want to really challenge yourself go to one of the off road parks Twisted Trails, Rocks and Valleys, or Silver Lake, i am a long time wheeler born and raised in sourthern Michigan as a kid, then moved to northern michigan and remember when we used to be able to wheel all over, well that has changed alot over the past years, and locals like to send out of towners into trouble areas, not all but most!
So I suggest if you want to have some challenging terrain go to the parks if you are just doing family woods running get a map from the DNR and make sure you stay on the trails as marked! get a ORV sticker! And dont tear up the two tracks! (myself i find it best to stay right the hell out of the woods!)
Michigan is hungry for money and the tickets are tough, and theres alot more DNR than you think!