Yo, Chundles, come pay a visit to Arizona, pretty much everything out here bites, stings, pricks, and poisons. The only thing deadlier than the bugs are the reptiles, and the only thing worse than them are the plants. That is, if you're not mauled by a mountain lion first, or caught in a flash flood (hint: don't camp out in low spots). Then again, without a gallon or so a day of drinking water, you'll be dead in 72-96 hours anyway.
You'd still be safer in the open country, though, than taking your chances on the highway...
And for all that, your spider still scares the bejesus out of me!