hello i am located in central oklahoma. i am getting a 2 acre pond filled in so i can expand my deer pens the work is being done this week. my question is what would be the best thing for me to plant being as i will have a lot of dirt and would like to keep it from washing out and would like to give my deer good nutrition. i would like what ever i plant to beable to stay during the winter months as well so the pen does not turn into a mud pen and was wondering what everone else is using and how it works for them thanks