Coyote Hunting Help!?

Hey guys thanks for viewing this now i live an Arizona and going to go coyote hunting for my first time. I went and bought a electronic call and its distress call is a distressed crow. So i was wondering if anyone knows away to maybe make a homemade crow? For a decoy. Or if you know any cheap ones. But i am also wondering if i can just put that motion varmint thing out there for the decoy. Even though it doesn't look anything like a crow? And any tips will be nice and i know the coyotes sense of smell is great but is it fine just to go out there with out doing anything about it or is that a big factor?