How about the guy that finds your sweet spot and decides to park his arse 20 yards from you, and then follows you after you leave that spot to another one? Or the guy who just throws water bottles up in the air and shoots them while you are trying to hunt. Sometimes I wonder what happened to common courtesy. As to the OP, depending on layout of field I might go maybe 20 yards in to set but no more - depends on sun and water location.
Freedom is a fragile thing ...Those who have known freedom, and then lost it, have never known it again.
-- Ronald Reagan