Hi I am legally a minor and going on a cruise with my close friend and her family. I will carry proper identification (my passport), but what other documentation or letters do I need because I have no parent going? Also on previous Royal Caribbean cruises I have been on all activities (rock climbing, skating etc.) require the parent to sign a waiver. Will my friends parent be able to sign this or will my parents need to give advance permission to the cruise line or will I just not be able to do these activities. Thanks so much in advance.