The full story, told characteristically matter of factly, is here. Check out the spot reference in the post to see how ridiculously remote they were. The more recent posts also tell of their journey back to Darwin on a road train.
Here at Chez Nicholas we are just SO GLAD noone was hurt, and can't wait for Dr C and Ann to arrive here in a couple of days so we can hug them to bits, and feed them,
Argh, life just knocks you sideways sometimes.