Go with a servant's heart. I thought I would make a little list of things to remember before you left. Here's some pointers for these next few weeks till you leave. Pray for your trip, for your team, and for the people you will meet. Give your summer mailing address to as many people as you can.
Mail is a great comfort.
Pictures are forever memories. Pack gifts for your host families and kids. Prepare your heart. I made that mistake and had to lug around everything from house to house because I just couldn't toss it all away. Leave room for souvenirs for when you come home.