Thank you so much for all the great information in this thread

I live in a swampy area of southern Louisiana and my property is absolutely infested with copperheads. I am afraid of my own shadow when I go outside. We bought this house two and a half years ago and it's so bad we're going to sell soon because I can't live like this. Every time I step out the door I make sure I have boots on - even when it's 115 degrees.
These snakes around here are not scared either. The whole they're-more-scared-of-us-than-we-are-of-them is out the window here. I am so happy to know that death from a bite is rare. I'm even happier to know about the dry bite thing. I never knew that before. I thought if you got bit by a poisonous snake there was always venom involved.
I'm still selling my house and getting the heck out of here, but this information will give me some peace of mind in the meantime.