You could start an
Outback Flyers thread in this forum, similar to our
Newbie & Flying Training Advice thread which has been running since August 2013, or our
PNG Ples Bilong Tok Tok which has been running since November 2004, or our
The Home of Photos in Dunnunda! which dates back to August 2006.
You may also find bush flying topics in our
Canada forum.
An Aussie Outback Flyers forum would struggle to survive as outback and bush aviation has been decimated to the point of near extinction. Certainly there would be insufficient interest or forum activity in a dedicated bush flying forum within our Aussie section of PPRuNe.
We have a number of Outback and Bush Pilots very active in this forum over many years, not necessarily only on bush flying specific topics but also all the non bush flying specific topics which affect their interest and participation in aviation.