Hiya Derek!
Welcome to planDisney! Planning a trip to Walt Disney World Resort or Disneyland Resort for over 100 people sounds pretty intense and also one of the best experiences ever.
Now, if you are leading a group of kids or students to the Park, I suggest you reach out to the
Disney Imagination Campus, which works with school groups, bands, and even scouting organizations. If you are traveling as part of an association, corporation, or even a huge family gathering then I suggest you seek help from
Disney Meetings & Events. Each office can assist with either Park and will guide you through all the details you need to arrange. If there are any tickets or discounts that can be available then they can direct you.
When planning large gatherings make sure to consider coordinating at least one event where everyone can hang out and get to know each other. Walt Disney World Resort can work with you to set up fireworks viewing events or even special dinners for your party.
I hope this helps and you all have a fabulous time!
Happy Planning!
-Nimmy