As part of the ABD if you arriving by car they offer free valet parking at the Grand Californian.
https://www.adventuresbydisney.com/north-america/hollywood-disneyland-tour/tips-faqs/
Car – If you plan to arrive by your own car, please drive to the valet area of Disney's Grand Californian Hotel & Spa. Just mention to the hotel bellman that you are with
Adventures by Disney and receive complimentary valet parking for the duration of your adventure. Since your Southern California adventure will conclude at this hotel, your car will be conveniently located at your vacation's end for your trip home.
- Disney's Grand Californian Hotel & Spa is located at: 1600 S. Disneyland Drive, Anaheim, CA 92802
Along with complimentary parking, on Day 1 of the adventure receive a one-time transfer from Disney's Grand Californian Hotel & Spa to Loews Hollywood Hotel. In order to take advantage of this transfer, please plan to meet your driver at 1:00 PM outside the main entrance of Disney's Grand Californian Hotel & Spa. In the event you are unable to locate your transfer vehicle or its driver, get help by introducing yourself to a valet and saying that you are with
Adventures by Disney. Your driver and the valet will be available to assist with your luggage.