Hi Marcella!
Thank you for visiting the Moms Panel!
Cinderella's Royal Table is one of the most popular dining experiences at Walt Disney World Resort, and many guests request reservations for this restaurant as soon as they become available at 180 days in advance. Coupled with the fact that you are trying to find a reservation on Mothers' Day, I think it could be a challenge on this occasion. However, I would recommend you keep checking
online, or by calling (407) 939 3463 as cancellations do occur, and you may be successful, especially if you are flexible about dining times.
Another restaurant that features character dining with the Disney princesses is
Akershus Royal Banquet Hall in the Norway Pavilion at Epcot. This tends to have more availability than Cinderella's Royal Table, but is still a lovely dining experience. Other signature dining that I would recommend are
Artist Point at Disney's WIlderness Lodge Resort, or
California Grill at Disney's Contemporary Resort (if you time your reservation to coincide with
Wishes Nighttime Spectacular at the Magic Kingdom, you can view the fireworks from the restaurant).
If you would like some more dining suggestions, please come back to me and let me know the ages of your party (if there are children involved) and the type of restaurant you would enjoy - I would be happy to help you find the perfect dining location!