Places that I was thinking about are in the lower peninsula of Michigan, I only know of a few trips that I have done in the past.
1. The Manistee River Trail (water, trail, scenery, Toilets in the Red Bridge area)
2. North Country Trail Manistee loop (rugged, min water, map see above)
3. North Manitou Island (water, most wild place other the UP, Trails, scenery, can handle larger groups, ferry to island min 2 day stay)
Other places??? Don't know to much about places handling groups out there and what the rules are. (some places don't want large groups ie, Deem wilderness from the Hoosier Hang)
I will look at my backpacking Michigan book to see what's out there. I would probably want to make it a backpacking hang with a limited number of people? thoughts? Ideas? Just throwing stuff out there....
Chime in everyone .....Clothes required .... Good one gargoyle