Leave the snake bite kit at home, or better toss it in the trash. Cutting and/or suction only further damage the tissue, which will already be considerably damaged because the rattlesnake venom breaks down the walls of the blood vessels. They also increase the danger of infection. Tourniquets and elastic bandages are also a no-no for pit vipers (rattlesnakes, copperheads, water moccasins). (Elastic bandages are useful for other types of poisonous snakes with different types of venom, in case some Australians are reading here.)

Rather than repeat the info I quoted in this thread, I'll just link to it here (I'm "grannyhiker" on that forum).

Another post on that forum by "chameleon" is the first-hand account of someone who was bitten and had to self-evacuate. Not fun!