We have been for Thanksgiving and New Years, the days leading up to both were fantastic, low crowds, amazing decorations. The day of both holidays and the attached weekend were madness.
However, it was really worth it as everything is even more magical then normal. The other interesting thing, I don’t like crowds, at all, but even though it was shoulder to shoulder on New Years Eve, I didn’t mind at all. Not even the slightest signs of panic, and my wife was watching for me to loose it! ( She was very proud of me and got me an extra hot chocolate! )
Anyhow, if you can get there before the actual holiday I think you will enjoy it!