Hi SoCalGirl....You are absolutely correct! My wife told me it's a Red Diamond Rattlesnake.
YAY! I'm a bit of an amatuer hobby herpatologist... I love the snakes!
I worry a bit about her being in the field, but I'm more concerned about what kind of human contact she has out in hard to get to places, than I am about snakes, Mountain Lions or other creatures.
This same worry is one of my biggest limiting factors when trying to get out there with my kiddos... I'd love to be able to do more camping.. but with no one to camp with it's not safe anymore to camp with just me and the kids... I can deal with snakes, mountain lions, bears (if necessary).. it's the two legged wild ones that 'cause me hesitation!