Do this route regularly albeit Narromine refuel stop ex Loxton.
My route which would be similar from Dubbo is...
Narromine, Moree , Gatton, Somerset dam wall, keep right of Kilcoy and follow the Brisbane Valley to Caloundra.
This route has limited tiger country.
The other suggestion given via South Straddie, Bribie is one that I keep in mind if the weather over Gatton is RS.
I haven't had to use that route yet.
Follow the valley from Gatton to the Somerset Dam wall where there are numerous ( smallish) ALA's.
I can send an OZ runways flight plan if you like.
Great scenery. Watch for fog forecast and keep just left of Amberley air space.
Also monitor frequencies for Toowoomba 127.65 and Watts bridge 127.3 and when closer 118.8 Caloundra and Caboolture.
My notes say 20 nm from Gatton not above 4500'
20 nm from Somerset 7500' if R620D is active, otherwise 4500'
Phil.