My family of 5 (2 adults and 3 children ages 4, 7, and 13) is going to GBurg this weekend and we really want to go white water rafting. My husband and children can not swim. I've heard that you don't have to know how to swim to go on a float/rafting trip on the lower Pigeon class I/II rapids, but I would never forgive myself if we went rafting and something bad happended. Advice please? Thanks in advance for your help!