Hi Stuart David,
It sounds like you have a wonderful family vacation coming up, and I hope I can help alleviate some concerns.
Walt Disney World is committed to providing the absolute best experience for their Guests, including
those with special needs. And yes, while size restrictions for standard strollers have recently been implemented, the same does not apply for mobility devices. Therefore, whatever stroller your daughter needs for comfortable access is happily welcomed. If you have specific questions about her stroller’s accessibility, feel free to reach out to Disability Services at disability.services@disneyparks.com.
As part of Disney's commitment to inclusivity, the four Theme Parks have individual guides for guests with disabilities (also available at Guest Relations). To make your daughter’s trip more magical, here are each of the guides:
Magic Kingdom Park Epcot Animal Kingdom Park Disney’s Hollywood Studios If a wait in line is strenuous for your girl, please look into the Disability Access Service. It is a “virtual line” where Guests can schedule a return time for any given attraction. You can enjoy other attractions and entertainment, or even grab a bite to eat rather than wait in a conventional line.
I wish you a magical visit ~ Rayna