It depends on exactly where in western WA you are looking. I hunt from I-90 Issaquah to Hwy 7 towards Morton. I dont know the coast at all. I could give a few hints if you could be more specific on where you live.
When calling coyotes, more often than not they will circle on a target they are
coming into and approach from the downwind side. Presumably they do this in
order to align what they smell, with what they are hearing.
This means that you should always have your downwind side camouflaged and have
an open shooting lane. If the area is heavily covered the coyote could come in
take a look and be gone, with you none the wiser.