Former Marine, soon to be AGR Recruiter trying to get from Germany to Wyoming

[bobcat]

A pick-up (like a Tacoma) or other high clearance (relative to a car) vehicle would certainly be advisable for the MT/WY areas as the bulk of the roads are gravel once off the main roads.  They're ok when they are dry or just covered with snow, but come spring and a thaw, yikes.  The fine dust and water turn into a goopy, sloppy mess plus some really soft spots in the road.  I'm sure you'll thank yourself for getting a vehicle with 4WD if you can swing it.

[Big Ugly]

According the snow map posted herein, the entire UP is under 16 to 24+ inches of snow, as is the upper half of the Lower.
Snow cover in Wyoming, with the exception of the mountain areas is a mere 2-4". whereas the rest of Michigan Lower is 8-16".
Having lived in the lower, Clare Co., and in the UP, on Neebish Island, there is generally a lot more snow in Michigan than there is in Wyoming, unless you are about 7000. There is generally more wind here in Wyoming, and it is cold. However, one year in Petoskey, Michigan, the temps never got about zero for about 3 weeks and were more like -20 to -40.
No matter where you are, you'll have weather! I guess that's why it's called that!
Anyway, 4WD is certainly the way to go - kinda like ammo, better to have and not need than to need and not have.
Be Safe,

[HardwareHank]

However, one year in Petoskey, Michigan, the temps never got about zero for about 3 weeks and were more like -20 to -40.

The winter of 1978/79 was like that here in the Basin. It dropped below zero on Halloween night and stayed there for the next month to 6 weeks. Every intersection in Worland was dug down to the water mains and smudge pots were burning... night and day. They finally took the stinking (but warm) water from Holly sugar plant and ran it through the lines. Incidentally, that was one of the worst winters on record in Washakie County for suicides.