Hi Alix!
Thank you for bringing your question to the Disney Parks Moms Panel.
While my collapsible wagon is so incredibly useful and used often at home, it is something we leave at home when we travel to Disneyland Resort because wagons are a
prohibited item in the park. This is mostly a safety concern because wagons are traditionally pulled behind and without the visibility there is more potential for bumping into others. I promise you though as useful as it seems at home, maneuvering just a stroller can be tricky at crowded times and I think you'll have found a wagon to be more of a hassle than a help!
If you are concerned with the things your little one may need in the park, I've found that my stroller usually accommodates everything we could possibly need! If you find yourself too overloaded there are
locker rentals inside both parks that could be used to store some things you are bringing for the "just in case" kind of instances.
Please let us know if you have any other questions!
-Lindsey ºOº