Becareful you may get addicted, calling in a predator is quite a rush. I have a friend that takes50-80 a year. He has a booyah call of some sort, but we always try and locate some by howling late the night before (around midnight), If you are lucky you will get some located, then get 100 yds or so away (terrain determining) and they should come in running after a few calls shortly after first light (I do not know what calls he uses in the morning, sometimes he uses yote calls and sometimes he uses animal in distress calls, depending on if he thinks a dominate male was howling the night before). If you shoot one play a coyote in distress call and sometimes others will rush in. If you have no luck with the yotes in the first few hours of light, move into thicker cover and try some animal distress calls like a woodpecker or mouse and you can call in some cats.