Lois, I remember well copperheads. When I was a young child, before we moved to Alaska, we had a copperhead visit our front yard while we were playing outside. It was a huge snake and very scary. Also, a friend of mine, when we were quite young, went fishing and looked for worms to bait the hook. He found tiny rattlesnakes shortly after they were born. Got bit a couple of times and had a pretty bad reaction.
The rattlesnakes in Arizona used the warm pavement too. It always felt bad to see them, especially in the spring, dead on the side of the road. I know people had to swerve to hit them.
Rose