Some people in here are talking out of there asses.
If it hasn't snowed in Alta in the past 120 minutes, you are skiing moguls. Yeah there's a shitload of snow, and the place is one big playground when it's snowing, and I've had some of the best days of my season there so far.... but there's also a shitload of people in this tiny resort turning fresh snow into moguls fast. So on the Xth consecutive sunny day, it might be interesting to look into park...
You can traverse from the Wildcat lift through the keyhole into Snowbird all the way to their park... They're not building proper kickers this year, so you get a shitty pipe, and some mediocre rails/boxes..
I'd either catch a ride to Brighton or Park City. Park City is epic. You could also hike into Brighton, kind of a mission, but it's possible.
Oh, and in Alta...
- skis with waist < 100 mm
- poles
- non-rockered skis
are frowned upon....