Hello there, Elisa! Welcome to planDisney. I see you are just days away from your upcoming visit and I'm so excited for you!
I know that wagons can be convenient for carrying around everything you need, children included, but unfortunately, wagons are a prohibited item according to the
Property Rules. If you are wanting to bring in more items than you want to carry around in the parks, I suggest grabbing a
locker rental for the day. There are locker options both inside and outside of the gates of both parks. The prices will vary depending on which size you are looking for but they have lockers that accommodate just about any size bag, including extra large lockers that can fit some carry-on suitcases.
I'm sure you have been watching the weather and have seen we've had some rainy days lately and a few more are in the future forecast. I see you are from Washington, and as someone who has lived in both Washington and southern California, I'm sure you will be well prepared. I definitely suggest packable ponchos for everyone. These work best in the parks. I also like to make sure I have plenty of plastic bags and gallon-sized bags inside our backpacks to store anything that I don't want to get wet, like our portable chargers and cords.
Elisa, here's to hoping the weather doesn't bother your visit and it's full of Disney magic! Thanks for stopping by!
Carrie