I hunt coyotes in Co and Wy, so this may not be quite the same as NC. I use a Primos Coyote Buster, which is fairly loud, has a great range of frequency and versatility. In the spring (lambs, fawns, calves on the ground) I can make it sound like a young animal, working up to one who needs his mama in a bad way. This brings the coyotes in, sometimes within a few feet if I'm real still. 90% of them come from downwind. I make sure I call, then scan around me with binocs. Lots of times people leave too soon if they don't see a coyote. Keep in mind that if the coyote is a mile away, he can hear your call and may be coming in, as you get disgusted and leave. A coyote can cover a mile in 5 minutes if he's in a hurry, but when they hunt or come to a call, they often slow down and get real careful, which means they may take 15-20 minutes. Overcalling can hurt your chances too. I call for maybe a minute, then wait for 5-10 minutes, call for maybe 15 seconds, then wait another 5-10 minutes, then I call for another minute, wait for 5-10. If nothing shows up, I move. Coyotes are pretty cagey about smell too, so I make sure I don't slather on bug stuff or use deodorant/scented soap. I wear a coat I hang in the horse barn, and sometimes grind up sagebrush in my hands to help cover my scent. Hide good, call a little, keep your eyes moving, and don't smell bad. If you can locate a dead calf/cow, hunt that area. Good luck.