Never had an issue, although one night we had a very weird experience.
I was camped, in swags, with two mates and my son, in a dry creek bed about 50k north of oodnadatta. We were about 100 metres off the road. One of those outback creek beds that's about 50 metres wide, and full of huge healthy gum trees. There was copious amounts of dead wood on the ground, and animal tracks galore, kangaroo, emu, goanna, and dingo.
We'd set up late in the afternoon, and spent the early evening looking at all the different animal track, and then getting some sunset shots through the gum trees. A really amazing spot. Anyhow we had a great fire going and had a few beers, my son had got to bed, and it was probably approaching 11.00 pm. It was a light night with a huge moon the kind that causes the trees to throw shadows, creating a bit of a spooky feel. We'd only seen a few cars all afternoon come by, and they tended to drive by at about 80 k without slowing down. So at about 11, this Toyota ute drives down the dip in the road, really slow. Of course this gets our attention and we all sort of look up at it and watch it sort of creep by. We were wondering if our fire could have been seen from the road. The ute gets past the turn off into the creek bed, and begins to head up the other side. They maybe 20 metres past the turn of, it just stops.
They sit there for what felt like an eternity, maybe 5 minutes, then drive up the road a bit further. We are all sitting there thinking, that was weird. But then he stops again, and turns into the bush, maybe drives 50 metres in and stops. We all start thinking its a bit sus, and get to talking about how it's a good thing there are three of us. We are sitting there thinking, nobody drives out here and stops at this time of night for good reasons. We are waiting and listening for the car door, and wondering what's next.
Then out of nowhere the car starts and drives away, very weird.