We took DS7 for his birthday two years ago, during the third week in January. The crowds were ridiculously low and we didn't see a single tour group the entire week we were there. Like PPs were were able to get all the ADRs we wanted, at the times we requested (LeCellier twice

). Even with shorter park hours, the low crowds meant we could accomplish more in a shorter amount of time, get to bed at a reasonable hour (important to keep DS happy for the next day) and find seats together on every bus. It was a little chilly in the evenings but compared to January in PA, it was balmy! We'd love to go again in mid/late January, but with DS in school it's hard to do.