some times it just dont work out no matter how perfect everything seems does it,I saw fresh tracks that were less than an hour old the other morning walking in to a set,I know they were fresh because the way it was snowing they couldn't have been there long,I kiled that dark colored coyote there and three others over the last few years so it's one of my favorite places,but I haven't had any luck there since november,I hunt it about once a month when every thing seems right.good luck,you seem to hunt alot and must have a lot of coyotes up there so it's just a matter of time before the next one.