what Asa finds he needs for success where he traps is all well and good- but its not even close to the realities of most canine trappers.
Human scent, in farm country, is a non issue.
I've done many tests in setting traps at certain times (AM ,PM) and using gloves, no gloves, kneeling pads, etc.
Final answer- when I collared the coyotes for te dnr for those 3 years, I often had 3-5 people all around the set when I made it. At a catch, it was even worse- everyone kneeling on the ground, etc. for up ot 30 minutes.
It MADE NO DIFFERENCE in my success rates (1 coyote per 15 traps nights) during this study.
Don't go out of your way to leave scent, but don't worry about it either if you trap where people are common. A coyote will never be fooled into not believing you were THERE, but he knows you ARE NOT THERE NOW.
Human scent disipates radidly in wind and sun. By evening, its a non issue for me and many other trappers.
Another factor is lure. Some trappers believe you can use too much lure, that overluring spooks a coyote...I believe just the opposite. A coyote plays with, rolls on, eats dead rotting pigs, sheep, deer and beef...6 more drops of a lure is going to spook him? Not here, not for me.
You want a silver bullet- pay attention to the visuals of your set- both good and bad. scent disipates, lures fade...visuals last.
I had this same discussion with Asa for several years. I'm not saying he is wrong, as his methods work for him in his area.
But I do say- methods are different in different parts of the country.
I don't believe in over cleanliness, changing boots, putting traps in hay, etc. Why? On the line experience shows that such extreme methods aren't needed and are a waste of time- for me.
There are many ways to skin a cat, Asa ways are one way, mine are another.
Study the animals, learn their patterns and their habits.
Thats where success comes.
Watch 20 good coyote trappers, and you have 20 different methods and sets of beliefs.