My DW and I attended the 9/9 party. I wanted to give it a couple of days before forming an opinion.
We were at MK earlier that day to take care of some of the bigger ticket rides that we knew would still be popular during the party. Throughout the late morning visit we kept noticing that the crowd level was very manageable. It wasn't empty by any means, but you could easily walk around without touching someone at arms length. We left around 12pm to go back to the YC to have lunch and rest.
We returned that evening around 6pm and got our wristbands without much trouble. The day crowds were still there, and a good number of people were in line for the party. Initially I thought that the rides were going to have long lines due to what I saw as a more crowded party than in previous years. It certainly felt more crowded during the party then when we were there that morning. However, my concerns quickly vanished as the wait times were not unreasonable for most of the party. SM only had about a 25min wait during the entire night, and other attractions were walk-ons. Only 7DMT & Peter Pan had wait times over 30min.
The bigger issue was the weather. It was overcast when we arrived, and started to rain/lightning around 7:30. This caused some rides to close temporarily, but we were still able to walk around to the candy locations and take in the decorations. Being in Florida during the summer you're guaranteed for an afternoon/evening rain, and this storm lasted till roughly 9:30-10pm. I decided to stay later into the night than my DW so I made an extra loop around the park. When most of the rain had stopped I happened to be near BTM at that point, and it was a walk-on. Obviously I chose the back of the train to enjoy the wildest ride in the wilderness!
I didn't participate in any of the specialty Halloween treats this time. I had read/watched reviews from the DIS team on what was offered, and decided to stick with the classics. The candy corn ice cream was basically vanilla flavoring with orange coloring. There wasn't enough time to appreciate the look of the ice cream before the Florida heat started to make it look like a melted mess. Afterwards I went for a Mickey ice cream sandwich. Nothing adventurous, but always hits the spot. I already had an ice cream bar earlier that day so I didn't want to completely go on a sugar rush. This is all of course ignoring the 10lb bag of candy I was carrying around with me all night.
Normally we enjoy character meet-and-greets, but during parties we would rather spend our time doing other things than waiting in long lines. It's possible to see characters and still do other attractions, but that's just not our style. We also forgot our autograph book at home so we couldn't cheat and get a new one.
To wrap things up I went on SM to check out the changes for the party. Aside from being pitch black dark there wasn't much in the way of decorations. However, it was still a lot of fun. Even if you have ridden it several dozen times. The major downside with SM at this time is the long walk to leave the ride while they are renovating the exit. Especially if you get stuck behind a crowd.
Overall I still enjoyed the
MNSSHP. The crowd size was a bit disappointing compared to previous years, but honestly we still did everything we wanted and more. At most we waited 15-20min for any given ride. With most being walk-ons. One negative impact with the crowd size was that navigating the park was tight at times depending on where you were. Especially when compared to the standard park hours prior to the party earlier that day. For me it takes a bit of the excitement away when I have to dodge crowds when going from Land to Land.
It's also a roll of the dice when it comes to the weather. We just happened to choose a party that rained for half of the time we were there. Planning ahead though made it tolerable since we had our rain jackets & shoes that could get wet.
If what we experienced is the new norm than I would suggest that anyone who is planning to go to a MNSSHP should temper expectations of low crowds, but also should realize that ride wait times will not be terrible. Just be flexible!