We had a wine-cask stolen from the car-fridge in the back of the Prado in Esperance! Nothing else was touched.
Mr D poured himself a glassful and left the vehicle unlocked, as he was going back for more soon, and it was gone within 20 minutes..... he locks up nowadays!!!
At a CP in Busselton, the bloke next door to us had a fridge under his annex, the next day he found his grog had been stolen.
So he didn't leave anymore grog in the fridge, just some food. Next morning I went outside my van early and saw they had smeared a packet of sausages that he had in the fridge defrosting all over the windscreen of his car.
The same night this happened, another caravan had an Engel outside chained to his van, he heard the chain rattle and managed to get outside in time to get a good look at those responsible as they ran off. He was an ex Victorian copper so went to the police station and gave a description of the youths, they were known to the police and were caught.
Another time, someone I know had their chair and table stolen from under their annex in the same park, which unfortunately didn't have a fence and was use as a thoroughfare by the local population. Someone else there had a caravan step stolen also.