I've ridden at Bohemia (had a season pass actually, they usually go on sale like the first Saturday in December or something like that, for $99. I think the daily rate is $40, so if you go 3x its worth it).
It is by far the best place to go in Michigan, but that isn't saying much. Boyne, Boyne Highlands, Nubs Nob are a couple of the better ski hills that are in the Northwest corner of the Lower Peninsula.
There are a couple of places in the Upper Peninsula too (Porcupine, Marquette, etc.) but I've only been to Bohemia.
Its pretty steep, has a ton of rocks to jump off of, has a ton of glades. Overall a pretty decent place. No grooming at all. The first day we went it snowed like 8" over night so it was a great day.