Our poisonous snakes are Western Diamondbacks. Generally two or three feet long, but I have killed a four footer. I have many snake stories, and have had the crap scared out of me several times.
I have a couple of very snaky creeks that I fish on, and almost never see a snake at the waters edge where we fish. Go up the bank a ways though along the brush line and you will find them. I'm pretty good at picking the spots where I could find one if I want to.
We sometimes hunt for them specifically, and it is pretty fun and exciting. And safer than just hiking or fishing where you're not actually looking for them. I don't personally know anyone who has been bitten, but I've come close. One time I stepped on a large flat rock that tipped a little and a snake started rattling. I quickly stepped off of the rock away from the noise and stepped right onto the head of the snake -- a big one. They say white guys can't jump, but they're wrong. My next "step" was about a ten footer.

jd