I'm trying to put together a group ski trip for me and about 10 of my friends. We can't decide between choosing something in Utah (Park City) or Colorado (Breckenridge, Beaver Creek, Vail, etc). Obviously cost is a factor, but we are thinking of a large cabin that is possibly ski in/ski out. Would we need to rent a car or would a shuttle to and from the airport be all that we need? When is the best time to go? We like to go out to bars so somewhere with a little nightlife would be good. Any suggestions are greatly appreciated!