It's the busiest week of the year. This past Christmas week a couple of the parks had to stop admitting guests for a few hours becuase they had reached capacity. Also the parking lots were full.
We are going the 18-23. I was getting nervous about going after reading the boards. But then somebody reminded me that I WILL BE IN DISNEY So, I may not get to see everything but that gives me a reason to go back. Plus, I have stopped worrying about the crowds because Christmas is the only time we can go and I cannot do anything to prevent the crowds.
I would suggest getting some guide books or subscribe to TGM for touring plans and general Christmas information that could affect your trip. Hope you have a fun trip.