Young Gun,
I agree with what has been said by the others, millet or smartweed are excellent waterfowl food plants, but with a pond of that size, waterfowl food production may not be the wisest choice of resources.
More times than not, waterfowl are attracted to small impoundments because of other factors besides food. They typically use these areas as loafing ponds where they can sit, rest and take advantage of the thermal cover (cattails, bulrush, etc) typically provided by these type of permanent wetlands. With that said, because its sounds like you have an atypical permanent wetland (a shallow bench with water depths of 12"-18") then you could possibly try the moist soil management approach that has been suggested. Just Google moist soil management and you'll likely get all the information you need to propagate these waterfowl food plants.
As for baiting, check with your local state game and fish agency. Here in California it's legal to plant a crop of anything, not harvest and then hunt over it. The sticking point is that you can't do anything outside of "normal farming practices" to "manipulate or make it available to the waterfowl". This is an extremely gray are as there is no hard and fast definition of these terms.
Make sure you have plenty of cover, keep it shallow during the hunting season, and hunt it lightly and you should do fine.
DD
