I walk only as far as I have to. I have pulled up to a hill walked over the top about thirty feet setup and within thirty seconds had a coyote down. I run my caller continuously for ten minutes. I turn my caller up almost as loud as it will go.
You will get hard charges coming in up to four and a half minutes after that it will be lurkers up to the seven minute mark. After the seven minutes your lucky if one comes in (not saying one won't come in). So ten minutes I'm outta there.
My brother starts out minimum sound and works his way up and down over twenty minutes. I personally think it's a waste of time, he is reaching the same coyotes with his loud volume as I do, it just takes longer for him.
I go for quantity over quality.
