From what I've encountered hunting yotes. I don't think you'll have much luck hunting them with a B/P firearm. Call or no call. Coyote are a little curious and sometimes bold but very suspicious of everything they consider unusual. The best way I found is to glass open fields for em before attempting to hunt. {where they are they are regular in seeing.} Where they aren't you'll soon get bored with waiting for one to come into your vision.
Although I do wish you the best of luck in your endeavor.