Hi Audra,
Thank you for that great question!
I think the very best option for changing an adult diaper would be a visit to the convenient
First Aid stations located in each of the 4-theme parks as well as Disney's Blizzard Beach and Disney's Typhoon Lagoon Water Parks. Here you will have access to private rooms with a cot, which would be suitable for this purpose. With air conditioning and privacy, this would be the most comfortable area.
There are also
companion restrooms located at each First Aid station as well as throughout most Guest areas.
For more information on
Services for Guests with Disabilities, visit the website or call 407-560-2547.
Please stop back and visit us with any further questions here at the Disney Parks Moms Panel!
Wishing you many magical memories,
Sally