The good news is, Anna and Elsa have been making appearances on recent sailings of the Disney Dream! I expect, with the popularity of the blockbuster movie Frozen, these meet and greets will continue through the spring.
Character Greetings with Princess Anna and Queen Elsa have been so popular that Disney Cruise Line has been ticketing these special meet and greet experiences. Simply check your Personal Navigator (a detailed daily schedule, delivered to your stateroom) for information about getting a ticket for this special event. You'll receive your first Navigator at check-in, and should be able to easily find times and locations for ticket pickup. Your tickets will have a time frame listed for you to attend the meet and greet, alleviating long waits for little princesses!
Please note that while the frozen fractals are in your favor, character appearances are always subject to change. Hopefully your granddaughter will have a most magical experience meeting her favorite royalty on the Disney Dream!
Please let us know if you have any further questions before you sail - we're happy to help! - Diane W.