I really don't know about crowds, but I can tell you that what I would love about that time is that you will be able to take in BOTH Mickey's Not So Scary Halloween Party and Mickey's Very Merry Christmas Party. Plus, the Food and Wine Festival is going on during that time. Sounds like a fantastic time to go to me. And, just think about this: If you don't like crowds, Epcot will pull a lot of people on the weekends for F&W, so you will no to avoid that park if F&W doesn't interest you, MK will have limited hours on party days so it will be less crowded then, but still be open long enough for you to enjoy the park. I would be very excited to go the week you are talking about.