We did CRT and the Princess StoryBook breakfast in Norway (EPCOT) on our last trip. I would say half the girls had princesss costumes on, and half didn't. It's really up to you. The many princesses will really spend an equal amount of time at each table, and will make each girls feel special regardless of what she wears. My daughter actually had on her princess shorts, t-shirt, with matching sneakers. She felt very comfortable in this, and we didn't have to carry the costume around. Cinderella, Aurora, and the other princesses spent a lot of time with her, because she is very friendly and was not afraid to talk to them. What suprises me quite often is that I frequently see parents arguing with their children because they won't put on their princess crown for pictures, or the child spills something on her dress, and the child is having fits because of this. Though, my (un)favorite scene is, when I see parents force their child to walk in the "princess shoes" in the park, when the child is screaming that their feet hurt. I guess these parents forget that the vacation is really for their kids (though parents get to enjoy the benefits too!). This always get a nice cold stare from me to say the least. Sorry to get a little off-topic.....Just whatever you do, please make sure your little princess is comfortable in what she wears, and know that she will definitely enjoy and feel special at each character meal regardless.