I'm going whitewater rafting. The real thing to waterproof Canon G7\nis this Canon DP-WC11 at 0 [URL]http://www.amazon.com/gp/product/B000JIOG5I[/URL]\n.. Since I hardly ever take any picture below the water, I want to\nskip that and go the cheap route. Has anyone tried any other thing to\nwaterproof a G7? Did it work well for you? Thanks.