Any three day weekend will be crowded. MLK is a bit different since it is so close after Christmas many people aren't up to traveling again so close to Christmas as they are recovering. I think that all weekends from President's Day weekend through mid-April will be rather busy due to spring breaks. Many are starting the end of February now and are scattered through mid-April. I think you should just pick one that works for you and give it a shot but I would get my reservations soon and then look for the price to go down. If you use a TA that specializes in Disney they will do that for you. In the past that is what we have done and it has helped. We did a package this past August with our tickets, etc. through Disney VISA and were able to get preferred seating at either the parade in DL or the electromagic parade in California Adventure ... that was nice. Also, had preferred seating at bugs life, alladin, the california show in CA (can't remember the name) and one other one plus an early entry into toon town one morning. It worked out well for us ... so that might be something to consider. Our TA set it all up and and we were pleased. We stayed at DLH this past trip.