Hi Duncan,

Sounds like plan...

You need a permit - http://www.nprsr.qld.gov.au/parks/fraser/camping.html

There are 35 camp areas. I have never been there and there is nothing in Camps8 about it that I can find. Maybe someone else can give a review on what the better sites are. But since it is permit only, you might just just have to take what ever is available.

Look forward to hearing about your trip when you get back.