Hello,
A few thoughts we go every year at this time... usually thanksgiving day, and 6 days after. We have found discounts at that time... in fact we used a discount code for 2006, and I am holding out hope that 2007 will be the same!
To answer your question about decorations, yes they are out, the candlelight processional takes place, and also Osborne Family (??) Lights are going on as well. It is a wonderful time to go, really anytime between Thanksgiving and X-mas is my favorite. The weather tends to be nice (not hot not cool, just perfect), XMAS week is VERY VERY busy... thanksgiving is as well, but not nearly as packed... usually by Sunday following Thanksgiving it slows down quite a bit.