On a party night, the early part of the day is usually very pleasant. As 4 pm draws near and party-goers begin filtering in, it often feels like they are arriving in much larger numbers than guests are departing. Main St can become quite a mob scene. At least some effort to tame that congestion was being exerted last year, as party guests were being welcomed into the park BEHIND Main St and integrated into the crowd close to the hub. It worked much nicer for those of us coming in, and the route was decorated, with character greetings, and special cookies along the way. I hope it gave the guests who were entitled to be there up until 7 pm a better chance to enjoy making their way down Main St.
By your dates in Nov, it is nearly dark by 5 pm, which gives you close to 2 hours of the nighttime atmosphere, and even enough time to see the Castle lighting, I believe. I would have no problem planning an MK day this way but wouldn't want to use that limited time having dinner. Enjoy the sights and lights and have a nice dinner elsewhere once you are out of the park.
For me, the most magical time in any park is when daylight starts to wane and the lights are coming on. Things just seem to glow with a special warmth and the sky is usually full of beautiful shades that change every minute. After dark, it is unquestionably different and very lovely, but never as lovely (to me) as the twilight period.
It is kind of funny being in MK when the crowd is changing over on a party night. Think of all the fresh, eager faces, full of excitement and energy merging with those who are, well, not so fresh and maybe downright pooped. It is kind of cool to people watch and absolutely no trick to sort out who's who.