Killington, Sunday River or Okemo for snowmaking, although Okemo suffers some because it tends to be somewhat warmer there due to its location. And all of them will be busy. Stowe might be a good bet, fewer crowds and the chance of some natural snow by then. Sugarloaf can also be a sleeper for that time of year. Good snowmaking, further north and generally colder, and a chance of natural snow. I went there for Thanksgiving a few years ago and had a very good time. Great facilities there too, to keep you busy if the weathers not good. Just for the record, I wouldn't go to Killington over Thanksgiving, way to crowded. Strictly hand to hand combat on the trails.