Sleeping out under the Australian stars on a clear night is an amazing experience.
And in case you are wondering what a swag is, it is a something like a large canvas sleeping bad (which is waterproof) in which you can put a small camping mattress, some bedding and a pillow. It also has a small hood which can be done up to keep the insects out.
Once you get out into remote Australia, where there is no light pollution (from cities, street lights, etc) you wont believe what the sky looks like - it will take your breath away.
Due to the huge size of Australia and the small population, once you get just a short distance away from the cities, the night sky lights up. With virtually no air or light pollution out in country it is one of the clearest night sky's you will find anywhere in the world.
And the good thing about sleeping in a swap (or camping) is that it also usually involves points 2 and 3 (BBQ and Beers) from above. I think it is a perfect combination!
Aboriginal Dream Time legend says the Rainbow Serpent is up in the sky, can you find it? And while you're at it, can you find the Southern Cross star constellation, used to find true south (much like the North Star is in the northern hemisphere).