Plan travel such that you can give her some play time in the evening. Am sure with other kids, your daughter is bound to get excited, play well and tire. Make sure to watch out so that she doesn't over-tire herself. Very important.
Definitely, do sleep with her! There's nothing wrong with it. And you don't have to suffer sleeping in a couch or so.. :)
If you use some kind of white-noise generator, or special night-lamp for your daughter, make sure to carry it with you. Set it up in the room she sleeps. It'll give her some familiar sound and light to comfort her.
Hope you have a fabulous time! :)