My 15yr old daughter and I are arriving in Arequipa August 6th and are planning on leaving for a 2 night Canyon tour the next day. Will we be able to make arrangements the day before or should we book on line? I was told that July and August are the busiest tourist months in Peru. Do you think it is much cheaper to wait? We don't want to miss the trip. I was told to go with a group instead of alone to make sure we have safe passage. Although I considered it on our own.