Hey Brian, Great story and fantastic shots!!
What type of camera setup were you using? My wife and I kayak alot, and I normally carry a 1D with a 28-300L so I only will need one lens, but after seeing the shot of your partner emptying out his kayak, it looks like you might be on some rough water.
How did you keep your gear dry and what type of setup were you using?
Great work and we'll have to check out the river when we head west on our adventure