Hi there. If you decide to travel this week, simply go with a realistic expectation of what it will be like. We traveled last year and took it easy and had a ball. We arrived the Saturday before Thanksgiving. I had been warned that the parks would get more crowded as the holiday approached, so we planned our park days early. Monday we went to the Magic Kingdom and that afternoon it was the most crowded I have ever seen it. My Mom was in a wheelchair and I literally could not push her in Fantasyland. It was a sea of people. We left and didn't return til much later that night and it was better. After that we decided to resort-hop, swim and relax! Epcot was never that crowded.
The weather was gorgeous and the kids swam every afternoon. The Xmas decorations were all up and we enjoyed visiting the resorts and seeing all the trimmings. We had some wonderful meals as I had made PS's early. We opted for Thanksgiving dinner at a resort and chose Boma, which was wonderful as always, The decorations at the Animal Kingdom Lodge were lovely and unique.
Leaving Florida on the Saturday after Thanksgiving was an experience. There was a line of traffic heading North on the turnpike that looked like when the weather channel shows people evacuating before a hurricane! We stopped around Ocala at a McDonald's and even this was jam-packed. A nice woman in the restroom told me not to fret, that the next day, Sunday, would be MUCH WORSE!
Moral of story? We had a ball. The decorations are wonderful and being together with my parents was great. The weather was lovely, not so hot as summer. But it is definitely very crowded. If your trips are really park-oriented, another time might be better. If you can "go with the flow" and do a lot of resort and shopping and dining activities, you might really enjoy this time at WDW. Another plus was that we stayed at Old Key West, a very relaxing resort that never feels "jammed" because it is spread out. Choose your lodging wisely!
Hope this helps. Also -- another nice thing is this week is great for capturing the PERFECT CHRISTMAS/HOLIDAY CARD PHOTO! I got a great one of the kids at Epcot, in front of a sea of poinsettias. That alone was worth the trip!
