Kayaking?! Your crazy!!!.......
And genius!!! Muahahaha! Good thing I have many years ahead of me to think about sometn like that. If i come up with something i will be sure to notify you!
Although there are some pretty crazy things one can do in a kayak such as going over high waterfalls there are many different ways to kayak and pretty much anyone can learn how. Some might think of whitewater kayaking as crazy but that's just one kind of kayaking. I've seen 6 year olds do it and met a woman in her 80's that has gone on several multi-hundred mile trip along the coast of Alaska by herself. I've got a photo of another woman that's over 100 years old paddling a kayak. I would guess that probably 80% of the caches intended to be done in a kayak could probably be done in a $15 inflatable rubber raft or even a pool float. I don't think I've seen any "kayak" caches that would require significant kayaking skills and I've taught dozens of people that had never been a kayak before how to do it so I have a pretty good idea what level of skill would be necessary to go after most kayak caches.
I dont think kayaking itself is crazy. Ive done it before and love it. Just akayaking cache. Crazy but genius!