Ill start and add some later.
Montana Snowbowl:
xThey dont have a public park yet, but next year I think they are making one you can use if you have a permission slip haha. And the freestyle team gets to use one down by the lodge.
xTheir snow isn't great, and they dont get a ton, but Its still pretty good considering the advanced runs can really be fun. I have a few secret stashes, but I aint tellin.
x Very expensive for what they have. I got a season pass there for next year(pm me if you wanna shred) just because it is closer.
Lost Trail
xLost Trail has two parks, both are great. They main one has some nice rails, and some really nice jumps as the season goes on, but it is the perfect size so you can hit most of the features in one run, but not get bored. The other park, my favorite, is located more in the trees. I skied it late season this year and they had a bunch of cool quarter pipe like jumps set up. Plus some cool jibs leading into more rails at the end.
I will add more, but it would be nice if other people did too.