Great RR! I've done most of this trip via snowmobile a few times in my life. It looks a lot different with leaves on the trees and ground and not 4 feet of snow.
One note to all. I am a groomer operator for one of the snowmobile clubs in Michigan and spend MANY hours all winter long making these trails super highways for snowmobiles. It's this time of year that clubs all over the state are out brushing and signing these trails to keep them free from blowdowns, low hanging branches, signs to warn you of hazzards and informational signs. We're all volunteers and always looking for another hand to help us keep things up to snuff. If you feel like helping out, just search the net for snowmobile clubs in the area you enjoy ADVing in and help out if you can. I'm all for dual purpose use on the trails, but looking for help to keep them in great shape year round.