i rarely see bucks feeding in planted fields during the daylight that early in the season. i would find a good trail and go back off a field or a food source a good 100 yards or more. hunt the kinda trails that lead into the nasty bedding areas. i also read that good bucks can be taken that early in the season by walking creeks. you come up on them fast and full of surprise so you got to be ready but with the water running it covers your sound.