Those are some nice looking deer!

The field looks plenty thin enough to plant into. I would consider peas and oats if you are interested more in a bowhunting attractant. The oats will germinate fast, and are more palatable to deer than buckwheat. Peas and oats are cheap, and you should be able to get them at a local ag supplier. If you are interested in later season as well (and don't mind that the crop will survive the winter), winter rye would be my choice (again cheap, easy to catch, and should be easy to find at a local ag supplier).