I have paddled for pics in both sea kayaks and a canoe in flatwater, but I prefer sea kayaks, as they are much more stable than a canoe. Most of my paddling for pics is with my husband and our dog and they are often models for my stock photographs. We use a Wilderness Systems Pungo and a Old Town Loon, both of which will accomodate the dog.
I usally start off with my camera in a large ziplock bag, then I place it in a dry sack. Of course, that doesn't last very long! After a few minutes of paddling, I'm ready to photograph our adventure as long as the dog is not in MY
boat! If you don't have your camera handy, you will miss out on a lot of great photo opportunities!
The biggest challenges for me so far (other than dealing with our dog and her desire to jump from kayak to kayak), have been getting sharp images and keeping the little bit of water that drips down the paddles off of the camera.
Here are my tips:
I recommend using a shutter speed (SS) of 1/500 or faster to insure that your images will be sharp. Set the ISO on your camera (I am assuming you are shooting digital)
to a speed that will allow you to shoot this fast. If you are shooting early or late in the day, you will probably need to use ISO 400 or greater. Don't sacrifice sharpness for a lower ISO!
If you are not able to shoot at a fast enough SS to create sharp images and you are photographing a moving subject, you can experiment with slow SS's to capture motion. Set your SS at about 1/8 - 1/15 and pan your subject.
For dealing with the water, I either put a towel or a plastic bag over the camera when I'm not shooting, or I just wipe off the water with a towel or a Chamois cloth.
Our paddle trips so far have all been very short and on flatwater. If we were to do longer trips, paddle whitewater, or paddle in the ocean, we would invest in a Pelican Case and probably an underwater camera.
You can see samples of our paddling pics at http://www.sherrimeyer.com