Thanks V. Not sure where to get those things in OZ, but will do the research online.
I don't actually have a barn, but we do have the clearest sky you have ever seen in your life and there is nothing quite like sleeping under the Southern Cross. No scorpions to worry about, only 9 or the 10 deadliest snakes on the planet, red back spiders, venomous tree frogs and cane toads etc etc.