Bite/sting Prevention and availability of anti-venom

[Sergio Big Dawg]

First of all I'd like to thank @Chaitanya D for this amazing post on dangerous scorpions and vipers.

My question is twofold:

1) is there any valid prevention strategy to keep critters away while camping in the desert? I heard some guys bring a bottle of diesel and they make a circle around the camp. I don't like the approach and I'm asking for alternatives

2) in case of being stung/bitten it's important to visit the closest clinic/hospital. I'm trying to come up with a full list of sites that actually have anti-venom. I called DHA, was bounced to 1 million phone numbers and emails, but I have not found a list. Does anybody have it?