Niels, that's rugged country. Not someplace you'd want to have engine problems!
Source: Australian Bush Airstrip
You are so right, there some engines installed in some aircraft types I would not attempt this type of flying.
You can play it safe, as some would advocate and fly IFR (I follow roads) and take your chances landing on a highway in case of problems.
Rotax has proved itself as a reliable engine provided you feed it oil and Avgas, Mogas if you like, and the recommended engine service provide your best
insurance that there are minimum problems.