If you are willing to improve your chances for a successful coyote hunting experience then you should try using some coyote decoys. A simple ground squirrel has proven to be efficient because this decoy makes the coyote to focus on the ground squirrel (resulting that he won't be distracted by the electronic caller nor the human one). Another alternative is to use a rabbit; it doesn't cost that much, it is easier to carry around and more life-like comparing to a hand wrapped body placed under the skin of a coyote.
The use of an actual coyote decoy can improve the overall results, but under certain circumstances and also at specific times during the time of a year. Nowadays, regarding the fact that coyotes are denning and also whelping, the use of a coyote decoy in combination with howling and/or other coyote vocalizations have proved to be effective. In order to get to this level of efficiency you ought to have a comprehensive understanding when it comes down to the vocabulary of a coyote and also their social structure.
A piece of advice: it will cost you less money than a full life-size mount to assemble a tripod frame from a half inch aluminum tubing - you must drape a darken coyote hide over the tripod in order to make it look like a sitting coyote, giving it a real look. Coyotes aren't clever enough to make the difference and for this reason, the set up works quite well. You should get good results if you do this the right way, without any mistakes.