We take Columbo everywhere with us. He freaks out when left in a crate, but is just fine when left in an ex-pen. I have one that is extremely light-weight (much lighted than even a crate) and very easy to travel with and set up. Here is the link to the kind I have:
SeaBreeze Petite Pens - A lightweight solution to heavy exercise pens I usually give him a bed in the pen and a little extra room to move around. If I don't have a bed with me, then I'll use a comforter or blanket from the house I'm staying in. The pen is adjustable to different sizes, so I can make it whatever size I need, it does not have to be set up very big. If you are worried about pottying in the house, then set it up on a tile or vinyl floor that can be easily cleaned up. If you introduce your baby to it before you go in July, she should be ok. It is not as confining as a crate, so they usually aren't as upset in there.