Welcome to the Disney Parks Moms Panel, Sarah.
Based on your daughter's medical diagnosis and the inability to wait in line for an extended amount of time, I'd recommend visiting
Guest Relations when you arrive at the Disneyland Resort (at either Disneyland Park or Disney California Adventure Park) and speak with a Cast Member regarding the
Disability Access Service (DAS). This service will allow Guests to return at another time that is comparable to current wait time for the attraction. Until your scheduled return time, you can enjoy other parts of the park, or grab a bite to eat. Shortly before your scheduled return time, your daughter can use the restrooms so she can enjoy the attraction without having to worry.
If you have further questions prior to your arrival, you can also contact
Guest Information or Disability Services to speak directly with a Disney Cast Member. I hope this information is helpful for you, Sarah. Please swing by the Panel again if you'd like more assistance in planning your magical trip to the Happiest Place on Earth.
Sending you Pixie Dust,
Kiki