Junkyarding Tomorrow. First Time. Any Tips?

Brake cleaner also makes an excellent hornet/wasp/yellowjacket/etc. killer, by the way. A little early in the season probably, but there's nothing more invigorating than sticking your head under a car and hearing an angry buzzing noise.

Your yard may not be as primitive as mine, but I always try to remember a tarp or something so I don't end up lying in oily mud. (can protect some against snow, too)