We discussed this all a few months back... If I have to wear repellent, I still swear by Bite Blocker (active ingredients soybean oil and geranium oil). Won't melt plastic, doesn't make my skin crawl, has a strong but not unpleasant fragrance, works as well as the chemical repellents. (although it does need to be reapplied a little more often than high concentrations of DEET) - but my mosquito block of choice is still a spun polypro painter's coverall.

But yeah... the fact that only about 1% of mosquitoes are infected with WNV isn't much consolation when I can get 100 bites in a single week if I go out unprotected...