The WL is one of the hardest resorts to get to during the holiday season so I am not surprised at all especially since that is a weekend.
This is mainly observation, but most of the travelers during this time of year are disney vets, so while the disney resorts may be full (value season = lower rates) the parks still aren't that bad because there are less off site guests. Weekends are busy though because many locals go as a holiday tradition. I wouldn't be too worried about crowds though, still a lot less busy than the summer.