@Morgan Murphy SNA here.
My SNA buddy from out here in CA, almost two years out of OCS, had class from 10NOV–16FEB or so. He opted for Christmas off and saw his family at extended family's house in VA. He said our timing is interesting because it is consistently disrupted by holidays. What you mentioned about the lightened workload on Thanksgiving also stands for other Federal holidays like Veteran's Day (first couple days there), as well as MLK Jr Day (Jan 18, i think). He said it makes it feel as though it goes by very quickly.
Also, his recommendation was that if you did take the leave and say, travel back across the country for Xmas, make sure you have a buffer time for weather/ freak stuff that could inhibit your prompt return. I will probably come back out here for the Xmas break if it is feasible, more for my Mom's sake than my own. But most I have spoken to about it say it is a nice opportunity to charge your batteries.
If I don't get back for Xmas, though, I'm in for this^