I appreciate the photos of Mungo National Park. I was in that area a little over a month ago; I considered going to the park, but thought that you needed a 4x4 to get in (I was driving a Nissan Maxima).
Robert you should go there! It's brilliant. If the weather is nice, then a normal car will get you there easily. I was in a commodore. Just get the hell out, if it rains heavily (or be prepared to stay for quite a while).