I killed my only mule deer on a hunt in Alberta. Setup was very similar to what is in your picture. We saw a mule deer bedded on the far side of a quarter section of mostly oats. There was a strip of alfalfa on the far end and we watched the mule deer bed down. I spent about an hour stalking up on him in my bare feet. The mud was cold, but quiet. I had the wind in my face and used those round bales to block his view as a stalked up on him. He stood up when I got to the bale 12 yards away and took an arrow from me. Short blood trail, nice 4x6 with a drop tine, in velvet.
Your only problem is too many eyes watching you with all those deer hanging around. If you could catch one of them alone you should be able to put a stalk on him.