We have been both. The end of January was less busy. However, some of our favorite rides were closed for refurbishment and the weather was erratic. The week after Thanksgiving was busier but not intolerable by any means. I did, however, have the impression before going that it would be a little less crowded than it was. If you have been at the end of May in the past couple of years, it was similar to that time to me. Weather was better in November, and we enjoyed our first Food & Wine festival and also the Christmas Party at MK. The free dining promotion was in effect during the November trip also. I can't remember any closed rides during that trip. So, I prefer the week after Thanksgiving, but January was definitely less busy.