Just dont give up try howls, cat distress if your in an area that is populated. The way I like to do it is scout find where they normally go in their regular routine , that way you are attracting them into a place they feel comfortable. Locate them in the moring before daylight them make a plan wait til after they have cleared the fields, that way your not spooking them . Then sneak in and make a setup in the woods the will usally comeback to a place the have just left if they werent spooked. Give them time . Also baiting works good this time of year just put it where you can see them first . No matter what they are tough to hunt just watch the wind dont let them see you on the way in and remember you wont call one to a place he dosent want to go.