Hi Beth! You are going to enjoy
Mickey's Not So Scary Halloween Party - it's one of my favorites! As far as the Main Street Bakery, I don't recall them having any special treats for the Halloween Party. And, like any other night as you reach closing time, it can be hit or miss as to what is left to sell. But one thing for certain, they do have some of the best sweets in town. I especially like their delicious cinnamon rolls!
Most of the goodies for the party can be found at the various trick-or-treat locations. Be sure to check your MNSSHP guide map for specific locations. In addition to trick-or-treating, be sure to experience the entertainment the party offers. The character dance parties are a ton of fun!
There will be merchandise specific to the party available during MNSSHP. It can change year to year but some of the regular items I've seen are t-shirts, light up necklaces, pins, candy corn ears, etc.
Have a blast at the party, Beth! Be sure to dress in costume to really get into the fun!