This year, we had no snow the Wednesday before Thanksgiving. Sure an foot or so may have fallen, but not enough to cover the rocks. So I went to California for the long weekend. I returned to find that well over 100 inches had fallen in the Cottowood Canyons, and made for an amazing opening weekend at all the resorts. Last year, I was skiing well before Thanksgiving weekend.
If I were a betting man, I would book the trip. If I were paying the bill, I'd strongly consider the trip. You've got a great chance of great snow, even if all areas within the resort boundarys are not open. If your a steep skier, you may want to wait another month for some more terrain to open up.
Crowds will consist mostly of powder hungary locals such as myself, but not much more. Lines will be short, deals will be hot.
We get amazing amounts of snow here in Utah, sometimes we play the gamble and get far and few storms. If you look at Alta as an indicator, you will see that they have made their average of 500 inches each of the last 20 years. For that much snow to fall, you have to get quite a bit early in the season.
We'll look forward to seeing you!