Who uses a boat for duck and geese? What kind do you use?

I have a river canoe that doesn't work so well (no keel) in the wind. I've looked at jon boats, prams, sneakbox boats and other homebuilt designs.
I made a box out of a single sheet of 3/8" ply that holds water out long enough to retrieve from a slough. Works well enough to keep the boots dry but thats about it.

Its summer and that means time to build stuff. Ian, do you have any pics of your homebuilt?