We go every year last week of August. While it is hot as all heck, the lines are usually very manageable (though that has always been with Fastpass). Seems this year may be even lighter though given the added elements of Covid scaring people away, and people holding off for the upcoming 50th and the opening of restaurants (Space) and rides (Ratatouie). We will see. I have never gone the week after Thanksgiving so I cannot really speak to that, but I understand that to be very light as well (and certainly the weather will be far better).