Welcome to the Disney Parks Moms Panel, Kelli!
Cinderella's Royal Table is a fabulous place to dine and meet Disney royalty. As you can imagine, it is a very popular restaurant among visitors to Magic Kingdom Park. If there are any last minute cancellations, the Cast Members who seat guests at Cinderella's Royal Table would be happy to accommodate walk-ins. However, having the opportunity to dine at Cinderella's Royal Table without an advance dining reservation would require a bit of luck and pixie dust. If you can be flexible with your dining time, be sure to let the host or hostess know as you approach the restaurant's check-in area. That may increase the likelihood of them being able to accommodate you.
However, I'm a big believer in back-up plans. Have you considered setting up an advance dining reservation to meet Cinderella, her prince and evil stepsisters at
1900 Park Fare? Cinderella's Happily Ever After Dinner is hosted there nightly. Trust me when I say that meeting Drizella and Anastasia is well worth the trip to Disney's Grand Floridian Resort & Spa. You could easily include this restaurant in your Magic Kingdom Park day as this hotel is just a short monorail trip away from the entrance to the park.
Of course, you could also meet Cinderella and Elena at Princess Fairytale Hall in Magic Kingdom Park without a reservation.
If meeting Disney princesses in general is your overarching plan, then also consider
Akershus Royal Banquet Hall in the Norway Pavilion of Epcot. Their Storybook Princess Dining experience is on every Disney princess fan's must-do list.
Best wishes,
Jill