Luckily, have never been bitten by a snake. Have encountered them on the trail, but no terrible experiences with them. I wouldn't know one snake from another, so I just try to avoid all. Decades ago, went to a rail trail in eastern PA with my wife and some friends. Unloaded the bikes, and as we were starting up the trail, came across a person with a burlap (I guess) bag and a pole with a curve on the end. Yep, they were catching rattlers so the venom could be "milked", to create anti-venom. There were more people, further up the trail, along both sides.
No, we didn't continue!