I think this one is the only one in the area that allows 4x4's, I was stoked to find there was something worth going to for a day trip! The wife and I are road tripping to the smokey mountains in Tennessee next month so I've been looking around for some trails to explore in that area or on the way while we're out there, thinking about taking a drive on the tail of the dragon while we're there too. We're also flying out to Moab in November so I wont have the Bronco there, but I will be doing a Bronco driving experience through Ford while we're there that's basically a guided day on trails all over the area which should be really cool. The dunes in Michigan is something I'd love to do at some point too, maybe next summer!
Tigerton up by Wausau is closed for the year I think, but I think some local groups run events in the winter as well.
Holly Oaks is a 6.5 hr drive from the Madison area, they've got some fun looking obstacles and a Jeep Badge of Honor trail to boot. They have the magna rock area too which is supposed to replicate some Moab stuff too.
TN has two good parks, Windrock and Coalmont. Windrock supposedly has a ton of awesome options, all different levels of gnarly from gravel roads to "you might want 38s and lockers for that".





