I wasn't at wdw during this years but I remember the posts here of how packed it was for MLK weekend. My experience is any long weekend holiday brings in a lot of people that weekend. More people tend to be there the short week (whatever week has the extra day off from school/work for make a week with less work days needed off) but the opposite week is also noticably larger.
but to be clear, it's always crowded, just a little more crowded then. Come to WDW when you can, there will be crowds any dates you pick so go with what works for your family.