First of all if you have never skied out west there are a few pieces of info that may help .
New England trails that are marked black could be marked blue out West . Quite a few double blacks out west have cliffs you won't see
in New England.
I'm guessing you haven't skied a lot of deep snow ? You may want to rent fat skis ,particularly for the mostly ungroomed Back Bowls
in Vail which may or may not be open towards Christmas.
Vail's Back Bowls and Blue Sky Basin are great. Plenty of gladed ski runs in Blue Sky. The Bowls have glades in some areas .
Good luck with your powder hunting. I ski vail about 30 days yearly so if you need any info ,pm me.