My plan went off without a hitch. Well, almost. It did take the kiddos a few more hints than I thought it would to get the big surprise. Once they did, Madi didn't seem to believe us. She kept asking "Really?" after everything we tried to tell her.
We've got it on video and we have a cute collage of surprise shots we made at JCP Portraits. The girls did a really good job and loved being in on the surprise.
I think it still hasn't quite sunk in for either kiddo. I'm hoping when we arrive at Cinderella' s Castle they'll be surprised even more.