My opinion, only an opinion, but I would smoke all that stuff and go back with some stuff that I knew ducks would eat. If you look around now you can find smartweed growing in the ditches. Snip it off and dry it out on a cookie sheet at the house. Same thing with barnyard grass and all the other free duck foods. Get a decent amount of seed stock-piled and throw it out next summer on the wet mud as the water falls out of your spot. No real need in buying stuff when the good natural stuff is most often free for the taking.