Really though, you should keep your heart rate as low as possible and cover the bite with a clean bandage. It takes a lot of antivenin for a timber rattlesnake bites and many hospitals don't have it because it's expensive and expires. Realistically if you're far from help and also far from a hospital, you could end up in a very bad situation.

Fortunately, timber rattlesnakes are not very aggressive and prefer to leave. They're ambush predators so be careful around bush and fallen logs you have to step over. Make noise while hiking,they'll likely leave and you will never know they were there. Copperheads prefer to hang out on sunny rocky areas, be careful climbing rocks.