We also did the Mary Poppins breakfast, and it did have the mad hatter and Alice in Wonderland. The Mad Hatter didn't bother us too much, and the girls really liked seeing Alice. Mary Poppins didn't walk around when we were there, she was in the lobby area when we arrived to do pics and autographs.
We must have gotten lucky when we did the Cinderella dinner at 1900, because there was no stepmother, just the mice, cinderella and the prince! Thank goodness for that, my girls would have hated her!!
We are doing Cinderella's Royal Table this year, and are really looking forward to it. I believe it's 2 TS credits.
Does she like other characters? If so, maybe the character meal at crystal palace, or something like mickey's backyard bbq? (never been to those, so can't really offer any reviews on them)
Good luck on whatever you choose!!