I would brush hog a portion of it, to lead them somewhere where you can get a shot. Your map didn't work for me, so I can't see it. But deer do not seem to mind when I cut fields. They're used to it I suppose, and often are feeding on the cut stuff the night I cut it. I probably wouldn't cut the whole field if it is several years growth, because they're using that for cover. Although, I would cut it all next spring and let it start over. If you don't it will be too thick before long. And it's nice to start new growth anyway
-Jake