I was there in '03 from Dec 12 to Dec 17 and it wasn't bad at all. Yes, it was at the end of the Pop Warner time but the kids really didn't impact the parks too much during the week. I was there last year from Thanksgiving Day until Nov 30...I have to say that based on the dwindling numbers of people each day after the 27th, I really didn't want to leave WDW. It was incredibly nice. I think the week-ends may be somewhat busier but the weekdays are nice. Yes, DVC people are there, MouseFest is happening the first week-end. Pop Warner is going on the following week-end I believe. And they tape the Christmas parade in WDW early in Dec (maybe the first or second Sat). So while it may seem that the parks might be crowded, they aren't really bad...quite the opposite.