I have a surprise trip planned for hubby's birthday from the 11th - 13th of December. I am expecting that Friday will be reasonable and we'll get quite a bit done, with the evening getting busy.
I fully expect Saturday and Sunday to be very busy. Since we're AP holders and there all the time, I'm going to do some other things on those days to mitigate the crowds (watch Aladdin, since it's going away in January and doing the Holiday Tour so we can hit a few rides with no wait and see the Christmas Parade without spending a ton of time waiting in a good spot, etc).
For your trip, I would expect the same...with Monday and Tuesday a little better crowd-wise. Most schools won't have started holiday breaks yet, so the parks get worse the week before and after Christmas, rather than your dates.