I went to the 6:45 show last year, and if I had it to do again, I'd pick that same time, with dinner afterwards. For the first one, it's really not dark enough (at least in early December). And for the last one, when are you going to eat dinner? I don't like to eat beforehand, constantly looking at the time. And eating after that one would definitely be too late. Several times, I went to the tree lighting at 6:00, then over to the CP.