We skied Smuggler's Notch, VT for a couple of days right after Christmas last season. It was great and not too crowded, but we lucked out and got dumped on. Otherwise there would not have been much open. Skiing glades involved ducking ropes and being very careful to avoid all the things you need to be careful to avoid when there is essentially no base. We then drove on to Quebec and had a marvelous time staying at a Hilton right next to the old city and driving out to Le Massif and Mont Ste Anne to ski. Both mountains were almost 100% open and Le Massif, in particular, had excellent conditions. It was cold as hell in Quebec in late December.
Jay is hit or miss and can be great if they get snow . However, it is early in the year for snow cover in the trees and it is a very crowded week.
I would think about taking the western trip over Christmas and skiing Northern VT Mid March when the skiing is great there and the crowds are thinning.