Ashley,
Thanks for asking your question to planDisney!
There are
lockers available at all of the Disney theme parks. They are at the front of each park after passing through the turnstiles, and there are a few locker sizes available. They are keyless and typically will cost you $15 or less for the day. If one will be large enough can obviously depend on the size of your car seat.
Disney's Hollywood Studios and
Disney's Animal Kingdom Theme Park have lockers that are as large as 15.5" x 13" x 17" (39.37 cm x 33.02 cm x 43.18 cm). The
Magic Kingdom Park and
EPCOT even have a few jumbo sized lockers available that are up to 17" x 22" x 26" (43 cm x 55 cm x 66 cm).
Because many car seats have a width of anywhere from 17 to 21 inches, my guess is that the lockers at Hollywood Studios and the Animal Kingdom are not going to be quite large enough. The lockers at EPCOT and the Magic Kingdom might, but now you know the specs and can check. I do know that our booster seats fit into the large lockers at all the parks, and that our car seats fit into the two jumbo sized lockers, but not the large sized ones. But that was about a decade ago, so break out your tape measure and see where you stand!
Please feel free to
write me back directly if you have any follow-up questions.
Have a Magical Vacation!Doug