Hi,
recently our 4wd club did a clean-up and shrub clearing at a free camping site on the East Coast of Tas (Friendly Beaches)
Now there are toilets provided there, not brilliant, but adequate.
The amount of 'doings' and 'bush daisies' we came across at the back of some of the camp-sites was, shall we say, exceedingly not pleasant. It is situations like this that I imagine is causing the push for 'self-contained' camping by those who have to deal with the unpleasantness left behind.
cheers