I have to say that the Cannon APS water proof camera is not that good. My buddy took his to Argentina and the pics were poor. Bummer because we don't get out that way too often.
I'll say it again. Look for the Nikon Action Touch (on ebay?). Like an auto Nikonos.
The Pentax WR series has gotten good comments from among many, Ralph Cutter who used his in a pinch for a Natnl. Geo asignment. That says a lot.
But anyone who knows, is crazy about the Nikon.