I agree with Duvvy I just started trying hunting Coyotes last year, I started out in Utah County on the West Side of Utah lake, Tooele, and out past Eagle Mountain, and I could never call them in, the first 3 of 4 yotes I got were ones I saw running through the sage as I was leaving, I figured maybe I was just calling wrong, but then I went further down south outside of Filmore and I also went east to the Uintas(which was alot harder to call) but when I went down to Filmore and Scipio just about as soon as we started calling they came running in. So in the last year or so I have killed 13 yotes, with only 4 being in Utah County and I was only able to call in 1 there.
I hope this helped.
Jake Sorensen