I stand corrected. Having never been to SA, and it not being such a popular destination for overseas tourists, I didn't consider it.
They do photo ops at Featherdale as well, but you can't hold the koalas.
Quick Google gave me this: "Many first-time visitors to Australia ? and even locals ? may not know that know there are many states in Australia where it?s illegal to hold that most famous of Aussie animal icons ? the koala. Queensland, South Australia and Western Australia are the only states in Australia that have koala holding experiences available, and even then some of the larger zoos and wildlife attractions do not allow koala holding. It is not possible to hold a koala in New South Wales, Victoria, Tasmania or the Northern Territory."