Well a coyote is by far the wariest animal I have ever seen. They have better noses and eyes than any deer. They always come from downwind. If it is legal, electronic calls are about the best thing I have seen. And you need to have a fluffy decoy that moves with the wind. Coyote hunting is the ultimate hunt that I have been on, they are some crafty animals. A nice ground blind that is camouflaged in well might be in order too.