Bring a snowmobile. In the winter, access is difficult. Like the Cascades but worse, because no high passes. Lolo is the only decent access and the only thing you can easily acess is this pinner peak called Mt. Fuji. Some good turns there if the snow is good, but nothing majorly inspiring. Best skiing if the snow is good is Montana Snowbowl north of Missouls. Cheap tickets, long and steep runs, good backcountry access, and a great bar.
Great spring skiing in the B-roots 'cause access improves and there are good roads that go up real high.