I just have a bottle of vicron that I usually have people spray with for the day they came they were already in the yard by the time they got my attention since I was out in the barnyard and I came to them and didn't remember to go get it. I got real careful with that stuff when I had that problem with my chickens.When our chicken group used to have coop tours, we all had boot baths outside of gates.
I kept a box of plastic disposable boot covers for all visitors.
One guy thought I was kidding when I told him he had to wear them.