Look out for "Quad Wednesday's" at Brighton during the first three weeks of December. Here's an ad from 2013 http://mtnadvisor.com/article/brighton-quad-wednesdays-bring-a-donation-ski-for-20/?id=344 The traffic can line up for Brighton below the entry into Solitude on a good Quad Wednesday. We chose to ride at Solitude to avoid the crowd at Brighton. Conditions are a crap shoot. One year it was decent and the following year at Thanksgiving we had to change from Utah to B.C. (Banff/Lake Louise) as there was no snow in the western states.
Addendum: The last "early" trip we made was in 2004 to Colorado. The primary reason for the trip was to get in on the local offer for the Aspen Classic Pass, have been able to renew on-line each year since. The early cost for the 2014/2015 season for 7 days was $350. This has paid off very well for us. BTW - Thanksgiving conditions back in 2004 were pretty thin. Loveland was okay, but IMO, not worth the trip due to limited terrain and what was open had traffic, but then I am accustomed to Buttermilk (lack of crowds).
Aspen Classic Pass http://www.aspensnowmass.com/landing-pages/classic-pass