dlloyd, there is a plant called Aeschynomene, also known as American joint vetch that is supposed to do well under wet or flooded areas. I've never planted any so can't expand on this. 4 years ago I had a 2 acre lake rebuilt and before it filled up I planted Japanese Millet on the mud flats. Jap millet is a popular food source for ducks when flooded, but the deer would not stay out of it. It is very easy to grow, 45 to 60 days to maturity and very inexpensive. A 50 lb. bag is about $25 to $30 dollars and will easily plant 2 acres. Most clovers will tolerate some wetness but not flooding. Hope this helps.