My wife and I drove into the Bungle Bungles three years ago and it took us three hours. When we got there everything was shut and the ranger station was empty. It didn't matter as it was well worth the drive.
Would I do it again? Yes! I would go in there tomorrow.
I live in England and we went for a six month tour. We bought a 1990 Pajero and did 22000 kms. It was great and I would recommend it to any one.
Me and the wife are in our 50s and camped all over Australia. We will go back again as soon as we can get someone to look after the dog.
Yes, it can take a while to cover those 50 odd kilometres... And it can take while to find the right person to look after the dog!
Hope you'll soon be able to come over for another lap around the country!