Hi Keith!
Wow, 100+ people? Now that sounds like a good time! I think the Walt Disney World resort would be a fabulous place to hold a family reunion. I have visited with extended family before, but now you've got my wheels turning in planning a family reunion for my own family here!
I would start by contacting
Disney Group Getaways. They specialize in assisting large groups needing 10 or more rooms plan a memorable Disney vacation! If you do reserve 10 or more rooms, a Disney Groups Specialist will help you plan your itinerary, make dining reservations, and plan special experiences only available to large groups.
Thank you for stopping by the Disney Parks Moms Panel, and if you have any more questions, please ask! I sincerely hope you have a magical vacation and family reunion! It sounds like a party I would not want to miss.
Happy planning!
Tania