Hey there Joyce,
Welcome to planDisney and thank you for your question! It sounds like you're in the midst of planning your next trip to the Happiest Place on Earth - how fun!
I'm happy to report that you would be able to use the
parking tram to the Esplanade just outside the parks. There are typically multiple trams running continuously throughout the day. From what I've seen they arrive typically every 10-15 minutes or so, but again it depends on the day and how busy it is.
Look for a
pedestrian bridge at the corner of Disneyland Drive and Magic Way to get access to the parking plaza, and then you'll typically go through a security screening on your way to the tram boarding entrance.
The parking structures and trams open one hour before park opening, so if you time it right then you can make your way into the holding area just inside each park and be ready for official park opening to start hitting your favorite attractions!
As you continue to plan your visit, make sure to check the
Disney Parks Blog to hear more about all the fun that will be happening around the Happiest Place on Earth! It's a really great resource to read about all the extra magical opportunities that happen throughout the year.
Thanks again for your question, Joyce, and happy planning!
Have a Magical Day,
Greg