There's the Michigan White Gold Card but it's sold out now.
For only $199 you get one lift ticket to 31 different resorts.
MSIA White Gold Card
With Boyne, remember I told you that students get a cheaper pass? It's only $329 with no blackouts; Michigan Skiing | Season Passes for BOYNE Ski Resorts | BOYNE
As for Crystal, keep your eye open at the end of the season. They offer their season pass with a special early bird price that ends in April I think. It makes the pass super cheap and a few trips to the hill will pay for itself.