Hi there, Anna!
Thanks so much for visiting the Disney Parks Moms Panel with your question. I'd he happy to assist you with your question regarding allowed strollers in the parks of the Disneyland Resort.
Recently there have been some changes to the Disneyland Resort
stroller policies and Park Rules, so I'm glad you are being prepared! Currently strollers larger than 31" in width x 52" in length are not permitted inside the Disneyland Resort. If your stroller falls between these guidelines then you are good to go! At all security checkpoints upon arrival, there are marked boxes on the ground to double check if your stroller fits within this limit. If it doesn't you will not be able to take your stroller inside the parks. Also note that stroller wagons, such as those made by Keenz, are not allowed in the parks as well. If yours doesn't fit the guidelines, don't worry, because
single and double strollers are available to rent directly from the Disneyland Resort near the entrance of Disneyland Park. These are offered on a first-come, first-served basis per day, so make sure you arrive early if you are interested in a stroller rental.
You will find that stroller parking is located near all attractions and dining locations. I recommend putting a unique identifier on your stroller so it is easier to spot in a crowd since many strollers look similar. I hope this helps, and please return if you have any other questions as you plan your vacation. Have a magical day!
-Jennifer