I trap farm country in midwest, and my corner of state also has a dense population of acreages further increasing the human contact points in area. I have never found human scent to be a factor here. There are plenty of footprints around, spent shell casings, farmers releaving themselves near the gates, trash blowing around, etc. etc. etc.
I set with bare hands and as trapnman mentioned focus more on making it look natural at your set vs. getting too hung up on the scent debate.
I spent so much time in early years swapping out traps, trading gloves, washing equipment, etc. it was silly. One year I was really rushed for time and broke all the scent rules but still did a decent job of blending sets. My catch rate didn't fall off at all, and hasn't since either. Only place I could see some merit with it maybe on a blind set, but if you have other focus factors at a set such as visuals (dirt hole, post, etc.) or scents like food or lure, the focus isn't on your scent so much any more, I think.
But again, there is typically so much human traffic through areas around here that whether I walk through an area to check sets or a hunter walks through chasing deer or pheasants I don't see how the coyote can tell the difference...and when it is there in my set later on I am convinced that the human scent factor just wasn't a factor around here anyway.
Jim