I wouldn't tell until you leave where you are going. Now I would tell her that you have a special birthday party/ surprise planned. Then before you leave, have wrapped a box with 'clues' in it. Sunscreen, an autograph album and pen for both girls, disposable camera for her pictures, and maps of
Disneyland and DCA and a Disneyland guidebook, a laynard and a couple of pins for pin trading. On the trip, this will give the girls something to do and allow them to decide their priorities.
I've done this with my Goddaughter for years since she was 3-5 and she loves it. She now expects that during the summer we will do something really fun and then for Christmas and her birthday, she may get pictures or a clue for next years trip.
Last year was Alaska and I did tell her. This year she doesn't want to know until we get where we are going (San Diego 2 days, Disneyland 3 days and Hollywood the morning we leave from burbank) She has been given clues and we will tell her the morning we fly out and she will help surprise her friend that is going with her. I am taking my lap top and will have other information with us and the two girls will have the descisions to make about what they want to do. For the girls I found at the local
disney store mickey reusable shopping bags that i am packing fo their trip. they will have reading material a beach towel, a lanyard and pins, an autograph book and pen, a lanyard with holders for fastpasses, room key and tickets in the bags and they will be able to carry this bag on the plane. We have five hours on the planes and about three hours in the airports so the lalp top with something to look up will be great with Wi=Fi in the airports.
Morgan has learned to trust that I know what she likes and that she will have some choices and be told what to pack and how. She has also realized that she needs to pack the way I tell her to and lightly. She has also responded well when I tell her who to take with her or when I limit this.
You know your child well and what she likes or dislikes. Morgan knows alsready when we are going, how long we are going to be gone and what she needs to bring and not to bring.
have a great trip!!~!!!
Have a great time with your daughter, family and her friend.