Try, try, try to change your dates at that time. We went just about that time, and when there is a 2 hour wait for It's a Small World, you know it's bad. Even lines out the door for the ladies' room. So crowded, you can't move. If I won a free trip at that time, I still wouldn't go.
Very frustrating to pay all that $$$, and basically become one of the pack. Unless you want to shell out lots of cash to see Christmas decorations, I'd reconsider, as you will become very frustrated.