Hiya Desirae!
Welcome to planDisney! I just had one of the most exciting experiences at
Bibbidi Bobbidi Boutique at Magic Kingdom Park a few weeks ago. My daughter chose to transform herself into Mulan and I loved how special every moment was with her Fairy Godmother's Apprentice.
No matter the time you make your appointment, these amazing Fairy Godmother's Apprentices will work to make your little girls into their most magically royal selves. Appointment times are approximately 90 minutes; if you need all of that time, you will have it. Since you are already at Magic Kingdom Park and then staying for
Mickeys' Not-So-Scary Halloween Party you will be ready to enjoy the festivities immediately. I highly recommend you get in line to enter the Park no later than 3:30 pm to enter Magic Kingdom Park with your party ticket and get your event bracelet at 4 pm. You do not need
Theme Park Tickets on top of your party tickets if you are only planning to enter at 4 pm. There will be a specially marked line for party guests and it can get long very quickly so get there early!
I recommend that you have an early dinner or late lunch with your family before the big events of that evening as it will help everyone stay in a good mood. I found that the lines for seasonal treats during the party can be long and take away from all of the fun.
I hope that this helps and you have a fabulous time!
Happy Planning!
-Nimmy