Hi Derinda!
Oooh! You are lucky to have gotten tickets to the most coveted night of Mickey's Not-So-Scary Halloween Party. Congratulations! You are going to have a spooktacular time!
Yes, adults definitely dress up for the occasion. While it isn't mandatory and there will also be plenty of those who don't, it is one of the few times in the year where adults are allowed to, so many do. They also visit the trick-or-treating locations and are encouraged to do so. The event is definitely catered to all ages, so don't feel silly and just have fun! There are always certain "rare" or hard to find characters available for pictures during the party, so if there has been a Disney friend you have wanted to meet, you may want to search online and see if they are going to be there. Other than visiting with a few pals, I definitely wouldn't miss Mickey's "Boo-To-You" Halloween Parade or the HalloWishes Fireworks Spectacular. These are easily my favorite specialty parade and show and so much fun to watch!
If you are looking for a little extra, you can purchase tickets for the
Villains' Sinister Soiree: A Wicked Takeover of Cinderella Castle event during Mickey's Not-So-Scary Halloween Party. I have heard it to be divine even though the company is a little evil.
Have a bootiful time, Derinda, and please let me know if there is anything else I can help you with.
HalloWishes to you,
Lauren