The bugs aren't much to worry about up there. Probably not so bad as many other places I've lived. Buggered if I'd be smearing vicks vapour rub around or listerine. That sounds like bullsh1t to me. I usually carried some effective bug deterrent with me and used it "as required". I don't worry to much if I've forgotten it in the morning heading out for a days work as it is not a huge issue.
Probably more important to carry some sun screen, a hat and a litre or two of water and a bit of food. You can become inadvertently dehydrated quite quickly with the nature of the short multiple legs and loading/unloading exercise you get. The days can be quite long, the airport kiosk a little "exxy" and not open when you want them anyway. The water is much better than it used to be up there but not a bad idea to boil it anyway. There was still a bit of Giardia (stomach bug) around when I was up there for a while recently.