Hi, there!
Welcome to planDisney, Oscar. I'm so happy you stopped by and even happier to see you're planning a visit to the Disneyland Resort! I'm happy to help you plan your visit.
The Disneyland Resort is committed to making sure that all Guests have a safe, accessible, and magical visit to the theme parks. While
wagons and stroller wagons are not permitted, it
is possible that you could have your wagon marked as a wheelchair to accommodate your daughter's special needs. That determination can only be done in person, though. When you arrive at the Disneyland Resort, be sure to chat with a Cast Member from Guest Services right away. If it's determined that your wagon is necessary for your daughter's accessibility needs, a Cast Member will attach a tag that marks the wagon as a wheelchair for your visit.
I recommend having a backup plan before your arrival, just in case.
Strollers are available to rent for use in both theme parks, but you may also
bring a stroller from home as long as it's no larger than 31" in width and 52" in length. My favorite stroller for my family's pixie-dusted adventures in the theme parks is the City Mini Stroller. This stroller has a larger seat than most and it reclines completely flat, giving my little one a comfortable place to rest.
Be sure to check out the
Services for Guests with Disabilities page on the Disneyland Resort website. I think you'll find the information there helpful for your visit! Based on her unique needs,
Disability Access Service may be a good fit for your youngest princess.
I hope this was helpful, Oscar. Please let us know if you have any other questions about your visit to "The Happiest Place on Earth!"
Ashley