You havent got much choice!
There is some mountainous country in that area- Great Dividing Range.
Fishery Falls on the coastal plain is very close to MT Bartle Frere (the highest mt in QLD).
If you live in Freeling how come u need to know the route?
Are u relocating a van for someone?
I live in Adelaide now and lived in the Cairns area for 20 years.
Grab a map!