Congrats on starting yote hunting, if youve gotten them to talk back at least you know where they are. A couple of things to try:
A light steady wind is best, if it is totally still or swirling a coyotes can't judge the location of a smell and are more timid. With a steady 5mph wind they will almost always circle downwind to try to pinpoint the sound, so be ready for that. If you can get one guy calling and another guy 50-100 yards out in front that can help. Also, concealment is key, they can bust you from a long way off, anything un camoed or shiney, or any movement and you're toast. You can try electric calls also, there are some great ones. Check out some of the predator hunting forums too, there is some good stuff there.