I strongly suggest...
if you can get a hold of Klauber's Rattlesnakes read the section on venomization. There are two to three paragraphs on the factors of the bite itself.
Some people die from bee stings. People have died from heart attacks after being bitten by a non-venomous snake. I've been bitten three times by the Eastern Diamondback with no permanant effects. Not saying it didn't hurt; stick your hand in a fire for a day or so. George Van Horn (RWS) is allergic to the Eastern Diamondback. A juvenile put him in the hospital, cost him a finger, and some use of muscles in his forearm.
Remember, venom is a food gathering apparatus, not meant for defense. It is believed 40% of the time the Eastern doesn't inject venom with a defensive strike. Of course there is always venom lingering in the mouth and they still have six rows of teeth. Any laceration will allow venom to enter the body.