I also avoid harming snakes where I can. The only times I'll ever kill one is if it's in or close to my house, or if I can't shoe it out of my campsite.

I'm dubious of the efficacy of "sucking out the venom" with a kit. Supposedly the newer Sawyer is actually worthwhile, but probably more for wasp and ant bites than snake bites.
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman