OOH, while working this puzzle it seemed to me that it was all Halloween colors. Well, humm. That is probably right in my case. I admire the people who can successfully navigate these things down a river or wherever. I'd probably tip over and drown before I went ten feet!
I got to go white-water rafting two years in a row on the swift American river! It was one of the most fun things I've ever done. I encourage you--if you ever have the opportunity, DO IT! It is so FUN!