Hi, MaryBeth! Mickey's Not So Scary Halloween Party is a lot of fun! There is so much to do with trick-or-treating, the parade, fireworks, dance party and more! The decorations are really nice, too. Purchasing tickets ahead of time is up to you, but several nights do sell out each year. You can take the chance that tickets will still be available at the ticket window, but be prepared that you might get shut out. While I cannot guarantee what nights will be busier, it seems like the closer you get to Halloween, the more the dates tend to sell-out.
For more information on Mickey's Not So Scary Halloween Party and ticket information, click
HERE. There are discounted tickets for certain dates, see the link for details. If you want to make sure to celebrate Halloween with Mickey and his pals, I would plan to buy my tickets ahead of time. Good luck!