Hiya Claudia! Thanks for bringing your great question to planDisney. I see that your planned visit has already passed, however I'd love to offer some tips that could help you in the future.
Unless you are staying at a Disneyland Resort Hotel, there is no official place to check your luggage. However, I do have a suggestion that may be able to help you in the future. There are
jumbo lockers available at the Disneyland Park Main Entrance for a
daily rental fee. In fact, I've used one of these to hold my carry-on suitcase while I visited the parks during an extended layover. The jumbo locker measures 18" wide, 25" high and 37" deep. Please be sure to measure your luggage (wheels included) to ensure that it will fit inside, there are also
suitcase measurement guidelines under Disneyland Resort Rules. You will be required to go through the screening/security check with your luggage to access this area. Please also make sure that there aren't any
prohibited items in your suitcase.
Claudia, I'm sorry we weren't able to get to your question before your visit, but I hope this is helpful for any future plans. I also hope you were able to enjoy the Disneyland Resort on your most recent visit. Please come visit us again with any questions.
Thank you!
Michelle