We usually go the week after Thanksgiving or the first week in December, we've gone later but find that the crowds are beginning to get thick by the second week and by the third week forget it, it's a mad house. We like the earlier times, because the decorations are up, the programs are all in place and running, ( The Christmas Processional is a yearly must) and most of the lines are non existant. You can pretty much book any dinner reservation you want and it's a much more relaxed atmosphere. MMVCP will be done or so booked up that you will still be fighting crowds, and it will be cooler also. Word of advice, take a sweatshirt, light jacket or warm sweater with you in the evening, it'd downright chilly at night there and last year I as glad I packed a lightweight winter coat. Used it most nights there. (and a few days too)