Kill all water moccasins.
I really really recommend getting a “snake zapper”. It is a stun gun which when applied to the skin around a snake bite appears to neutralize the venom. Zap every now and then until the pain of the bite is gone. Usually, it only takes 3 or 4 zaps.
Do a google search to find it.
Medical professionals will tell you this does not work and it is dangerous to apply an electrical charge to the body.
I live in Papua, Indonesia and I have seen people get bitten by death adders, use the zapper, and suffer no ill effects. Given the choice between a painful zap or having my foot amputated, well, I’ll take the zap.
It works with all types of venom. I’ve used it on myself for wasp stings.