Do you worry at work when you are walking through brush to a seldom accessed outbuilding or pieces of outdoor equipment?
I don't worry too much but when the ground has lot of rocks for a speckled appearance I do think a snake is just where I can't see it.
In the summer, I'm always on the lookout for rattlesnakes. Scorpions and vinegaroons too. There are black widows here too, but if they see you they'll make a hasty retreat. It's kind of rare to actually see one, and if you do, it's always hiding somewhere.