Lets see... Hunters way over priced, but has a really solid mountain for just sking. the park crew sets up a pretty dope park mid-season.
Windham def has the best terrain parks out of the 3 but its sooooo icy there. The term "ice coast" was probably formed there. I've been there probably ten time over the last few years and have never had a day were the conditions weren't shit. IMO avoid
Belleayre is the mountain I'm most familiar with and usually go the most out of those 3 but they have the most pathetic attempt at a terrain park i have ever seen, i got a concussion last year hitting a box rail cut there was a nail sticking out of the end of it! if your gonna go there, go to ski trees or groomers, not for there terrain parks. just my 2 cents