We were in WDW the first week of December our last trip and the crowds were not bad at all. I believe the closer you get to Christmas the heavier the crowds get. Sign up for Mousesavers and you can find cheaper tickets through them on Ticketmania. Unfortunately, they only send out a newsletter one time per month and that's on/around the 15th of each month. You won't get your first newsletter until July if you sign up.