We did this on our August 21 cruise. We rented two doubles. My hubby and my nephew (15) were on one and my daughter and I on the other. We had conflicting opinons on this excursion.
My husband and nephew really enjoyed. They went fast and loved the speed. My daugher, who is 9, was scared. I had a hard time keeping up with the guide and was always the last one in our group. Not a horrible thing, but with her being scared, it made me uncomfortable. I was scared I was going to tip us over or go to fast for her. Part of the problem was she had to sit behind me.
All in all, I am glad we did it. I'm not sure I would do it again (probably not). We did get some beautiful photos while out there so don't forget your water camera.
Enjoy!
Mary