If your at Big Sky you can't really go wrong with the Tram to Shedhorn or Dakota and Challenger especially if we have fresh snow. On the Moonlight side I'd ski Lone Tree and take a few laps up Headwaters.
Go to Big Sky for the huge resort feel. Go to Moonlight for a much more chill vibe, cheaper lift tickets, and a sicker park. I like them both personally, so I couldn't tell you which to decide
And I've never been to Bridger
Not kidding, I work in Big Sky so I get a free pass here. I'll probably make it up to Bridger before the seasons over.