I went over for the day yesterday and spent my time between DTD and AK. It was pretty crowded. I figured it was probably due to holiday travelers. Most people I spoke to said they came to take advantage of the long weekend and were leaving on Monday (today).
We usually go the first or second weekend of Dec. as that is my DD18's birthday time, and the crowds are usually smaller at that time. We're going back this upcoming Saturday and Sunday so we'll see what its like this year.