I don't know what Christmas eve is like, but 2 years ago we spend New Years eve in WDW. NEVER AGAIN. It sounded like such a blast we couldn't wait to get there. ( We arrived 12/27) The first couple days the crowds were not bad and with fast pass actually pretty good. Started to get really busy on the 30th and the 31st was jam packed, busy, crazy, wall to wall people and down right scary with all the crowds. We started In MK at opening to beat the crowds, HA ! Didn't stay too long, it took over one hour to get from entrance to the bakery on Main Street. We detoured and headed to Buzz lightyear ride. Already a huge line and the fast pass return was for 3 hours later. We decided to try AK as it is not usually as busy there. Wrong, it was the busiest we have ever seen. After about an hour there and just dodging people my daughter (7at the time) started to have a breakdown and let us know she was tired having her face and head bumped into by everyone else's behind. Fortunately, it was a warmish day and we settled for the pool (sunny and temps about 75- warmer than back home so why not swim). By the time we boarded a bus and back to resort (CBR) not a chair left at the pool, and overflowing with people. By this time it was actually time for lunch. We took a taxi into downtown Orlando for lunch and then returned to our resort for a nap and then spent the rest of the afternoon playing a couple card games with the kids. Good thing we had them. By this time we were looking forward to the evening, dinner reservations at Epcot to start and then take part in the festivites. Thank goodness we had reservations, even with them we waited just over an hour for our table. This was still early in the evening. After dinner we planned on walking around the World showcase as there were street acts, live bands etc. The crowds were unbelieveable. At one point there were so many people coming towards us that no one could move, we were literally stuck. We were scared. It there was an emergency we would have been in danger. To make a long story even longer, we went back to the resort and played a few more games and went to sleep. New Years day was actually better and we enjoyed the parks while everyone else slept in. But we would never go again for New Years. I still have nightmarews thinking about the crowds.