Ooooh I remember those days. Are you singing at music festivals and competitions on the way? Other schools would hate us when we'd show up Don't worry about the slip up... chances are, towards teh end, the audience has already forgotten the "goof"
Sounds like a lot of fun! You get to sing and travel at the same time. I wish my school choir had done that...the most cool thing we ever got to do was sing in the odd competition.