Welcome to planDisney, Cheri!
In the words of Rapunzel, it certainly sounds like you are going to have the BEST. DAY. EVER!
Mickey's Not-So-Scary Halloween Party is so much fun!
Disney's Not-So-Spooky Spectacular will have you mesmerized. The
Hocus Pocus Villain Spelltacular will have you giggling. And
Mickey's "Boo-to-You" Halloween Parade will have you dancing for joy.
If you've purchased your Mickey’s Not-So-Scary Halloween Party event tickets, you can enter Magic Kingdom Park from 4:00 PM on the day of the event. You won't need a separate theme park ticket or even a theme park reservation. Having the Park Hopper Option is great, however, you don't need to technically park hop to attend Mickey’s Not-So-Scary Halloween Party. Therefore, you don't need this option unless you'd like to visit EPCOT or Disney's Animal Kingdom Theme Park that same day (or enter Magic Kingdom before 4:00 PM).
Hopefully, that makes sense! Here's a tip: if you plan on wearing a costume for Mickey’s Not-So-Scary Halloween Party, make sure you dress cool. Don't forget: it's still the summer!
I hope you have a fantastic time, Cheri.
See ya real soon!
Mike