Make sure you ride in these a good amount before starting your tour. You want your feet to acclimate to the shoes gradually.
When learning to learn how to ride with clipless shoes, there are two kinds of people -- those who have fallen over, and liars. The problem is, you have to remember to clip out before stopping. Most people do OK when they first start. After a while, they think they've got it. Then they lose their focus, forget to clip out, and fall over as they stop. My fall happened next to a car of attractive young women. It hurt my pride. This is just another reason to ride your new shoes a good amount before starting your tour.