What about peanuts??? They are pretty drought tolerant, have as much protein as alfalfa, deer love them and in our sandy soils in eastern NC they do well...We sell ours to Planters, in Suffolk, VA...

When I worked for John Deere, seems I remember that OK also grew peanuts (as well as GA and NC)...While we raise Virginia Jumbo, ya'll raise Spanish, if my memory is correct...