Great shots. Having photographed from a kayak a lot in the past, I am really impressed that you were able to stay on target for the sequence shots! My kayak always wants to drift in a circle at the most inappropriate time.
This is a great sequence Geoff... pretty mazing that you can support the 600mm lens demo kayak... I can do this with my 500PF, but wouldn't come close w/ a 600mm f/4!
Picture number 4 is very cool w/ the V-Wing against the background of trees.