But then you hit a really good day and it is all worth while. The Coyotes won't come in if they see a vehicle. Typically this is behind a slight rise or hill where we can park on one side, walk over the top, and call the other side. Trees work well to hide the vehicle too. Deep canyons rarely produce.
Gentle slopes seem to do better.
Don't slam doors and don't talk. A quiet car that you ease into the area is a plus too. The time it takes to collect up and walk to the set is usually sufficient to settle the area down from the vehicle. But, waiting a few additional minutes after setting up doesn't hurt at all. We call from a slight rise so we can see down onto the area where we are calling.