If we ever get a regular winter again we should do a tour of unusual places to ride in NW Michigan. There is also another place literally 10 miles from where I grew up (where my mom still lives) that was a downhill ski area in the 1960s and is now still groomed for X-country skiers. By looks of the satellite there are still some places you could ride if you were willing to hike it.
I have enough family between Manistee and Traverse City that we'd always have free places to crash.
God I wish I was up north right now....just cause I live here doesn't mean that that place still isn't my home.