Neal , what is the country like where your going coyote hunting ? Open sage brush and grass lands with rolling hills ? Howling at this time of the year gets the blood pumping as they come looking to kick the intruders out of their home areas . Some simple howls tend to work good . A howl of normal length , a few seconds wait then another howl the same wait a few seconds an give two quick barks followed with another howl . Wait a few minutes and do it again They will either answer you and then go quiet as they start coming in to you or if you are close to their den they will just show up on the run or be setting and watching you . I like to have a backing of sage brush or similar backing not sky lined and walk quietly , hide my truck and close the doors quietly . but you know all that stuff . A good hand held or voice howler can have a blast and exciting time this time of the year . Enjoy your hunt .