Aloha, Susan!
Thanks for bringing this great question to the Disney Parks Moms Panel. I can't wait for your visit to the Happiest Place on Earth.
There are two official theme park
parking locations at the Disneyland Resort: Mickey & Friends Parking Structure and Toy Story Parking Area. Oversized vehicles, motor homes, or vehicles with trailers are only permitted to park in the Toy Story Parking Area located off of South Harbor Boulevard. Keep in mind that these vehicles also pay a slightly higher parking rate than a standard vehicle, but they still will have in-and-out privileges all day included in this daily rate.
When approaching the resort you can locate this parking area by simply typing in "Toy Story Parking Area" in any GPS mobile app or device. Once you arrive and park, there are convenient buses at this location that will take you directly to the theme park entrances. As you exit the parks at the end of the day, head back in the same direction in which you arrived and follow the signs to the Toy Story Parking buses.
I hope this helps, and please return if you have any other questions as you plan your exciting vacation!
-Jennifer