UP is pretty magical. Some pretty tough trails up there and some easy.
The 4wheel club at Michigan Tech was a lot of fun. One of the guys In the club at the time had a sweet classic Chevy truck with a winch off a ship or something like that was Pto driven mounted in the bed. Dragged my ass up a large number of hills.
Not sure what's actually on a map up there so to speak, but many trails. You'd want to go up there with a group of people. The logging trails can swallow you pretty quick.
If you were really interested guys in the club could help you out. MTU 4x4
It's been a while since I've been back that way to 4wheel (10+ years) so not sure what help or advice I'd be now.