One of the things I remember about central South Australia is flies...lots and lots and lots of flies! (crawling into our ears and eyes and noses and mouths, swatting them with tracts and magazines to no avail)
I also remember the drive home from one trip to isolated territory, our carload was going south, two buses were going north, then a massive 4-wheel-drive overtook the busses. We had the buses pass about an inch away on one side of us and the fwd pass about an inch away on the other side. One of the women in the car said that she had this picture go through her mind of there being nothing left except someone's shoe sitting in the middle of the road. I think the bloke who was driving just about shat himself, he disappeared into the bush for a while after that and I think the rest of us just sat in the car in shock.