Placing your blind in the middle of a open field was your biggest mistake. I have had success with ground blinds on coyotes but I never set them in the middle of a open field either. Instead I set it up in field edges blended in with the trees at the field edge and about 5 feet or more from the field edge or deep woods which is actually my more preferred set up and they come in even closer in deep woods and I'm usually using a shotgun when hunting from the blind.We tried to call coyotes to the blind while turkey hunting last spring, and we never brushed the blinds in, you don't need to for turkeys, and although we called coyotes into rifle range, they stayed far enough out that a bow wasn't the tool to have in hand. They didn't like the blinds stickin' out in the middle of the fields and with the sound coming right out of the blind, they simply didn't approach any closer than they had to.
He was turkey hunting, hence the blind in the middle of the field.Placing your blind in the middle of an open field was your biggest mistake. I have had success with ground blinds on coyotes but I never set them in the middle of an open field either. Instead I set it up in field edges blended in with the trees at the field edge and about 5 feet or more from the field edge or deep woods which is actually my more preferred set up and they come in even closer in deep woods and I'm usually using a shotgun when hunting from the blind.