Hi there, Heather!
Welcome to the Disney Parks Moms Panel, and thanks for this great question. I'd love to help you plan your trip to the Happiest Place on Earth!
I'm excited you are planning on including Character Dining in your vacation plans. This is such a great way to enhance your vacation. With options in each of the three Disneyland Resort Hotels as well as in Disneyland Park, there are five great
Character Dining experiences available at the Disneyland Resort. Unfortunately, if you are using a One Park Per Day ticket at Disney California Adventure Park, you will not be able to enter Disneyland Park to dine at Plaza Inn even with a reservation. I suggest dining at Storytellers Cafe in Disney's Grand Californian Hotel & Spa for their amazing Character breakfast if you plan on visiting Disney California Adventure Park that day since this restaurant is just footsteps from that park. This location offers farm-fresh cuisine while you get to meet some of your favorite Disney Pals at
Mickey's Tales of Adventure Breakfast Buffet. You can make reservations for these dining experiences 60 days in advance online, on the Disneyland app, or by calling (714) 781-3463. I hope this helps!
Please return if you have any other questions, and have a Zip-a-Dee-Doo-Dah day!
-Jennifer