Be nice to see a larger area but with what is shown I would pick the inside corner on the other side of the gully.The wind would be good, they would have a good protected approach and not feel trapped.Set up inside the tree line at the point where you can barely see the field behind you.Early morning just as the suns lighting the horizon.Decoy in the field would be helpful but not necessary.It seems where your choices are would be easy for them to get downwind undetected leaving a disappointed hunter wandering why they don't show themselves.Were is there main food source in the area?Good luck and let us know how you make out..