You will have a fantastic time. WDW at Christmas is the most magical time to be there. Make sure you see the Osborne Family Lights they are unbelievable. We go almost every night just to see them. Also, if you will be there before Christmas, make sure you go to Epcot and do all the countries. Many of them have their Santa there and we all know that after Christmas Santa goes back to the North Pole. Also, during Christmas Week, there are lots of shows going on at the parks. If you are there for New Years Eve, I would recommend Hollywood Studios. We went there on the recommendation of many cast members. We were told that EPCOT has alot of well partied individuals, to be politically correst. Magic Kingdom has lots of screaming kids. We were told that Hollywood Studios only does fireworks twice a year and they were fantastic. They lasted over 30 minutes. The crowds were unbelievable, but we got out of the park pretty quickly. Also, the parks get filled to compacity on New Years Eve, so you need to pick a park and be there by about 4. Hope this helps. We should be there at Christmas this year too. Can't wait.