My 5yr old twins had some pre-trip anxiety before our last trip, but once we were on our way they were fine. Sometimes it is hard to tell with young children if they could be worrying about something. I am willing to bet she will be fine once you go. On our last trip my girls got nervous because they thought we were moving there and they werent coming back home again, so I had to be more specific on our plans. I guess I just assumed that they realized that we were only going for a week. Then I thought about it and realized that their concept of a week for them is probably different than mine. They were also concerned about their belongings and the house for a bit, until I reassured them that everything was going to be fine at home while we were gone because the neighbors would keep an eye on things. The whole trip thing can be overwhelming for little ones. I am also going to bring back little treats for their classrooms. They want to buy them with some of their disney money, so my girls are very much looking forward to that. I bet your daughter would love picking some things out to bring back. Good luck and I hope you enjoy your trip!!