I saw your question the other day and I had remembered reading about something (boy, this was nagging me, because I couldn't remember where!) So, I was so thrilled to find it today (on the Disneyland web site)!
Here you go: "Alice in Wonderland Easter Basket Buffet
Celebrate spring with a festive journey to "Wonderland" on Sunday, April 20, between 8:00 a.m. and 2:00 p.m., in the Grand Ballroom at the Disneyland® Hotel. Join us for this all-you-care-to-eat dining experience, complete with visits from Alice and many of her Disney friends, interactive activities, photo opportunities and much more. Price is $52 per adult; $13.50 per child, 3 to 11 years old; and free for kids under 3 (tax and gratuity additional). Complimentary valet parking provided at the West Magic Way entrance. Validated self-parking is also available.
Call Disney Dining at (714) 781-DINE to make your reservation. And don't forget, if you're a Premium Annual Passholder, you'll enjoy a 10% discount please be sure to mention your discount when making your reservation. "