How many seats do you need? If by yourself, as suggested there are probably some CPL guys who'd be happy to share some hours once the borders open up. Alternatively, there are plenty of RV owners in Aus who I'm sure will be keen on sharing costs for a blast around the country. Best contact there is many Chapters of the
SAAA
You definitely want to use
Ozrunways as a source for your EFB flight documents. Works great on an Ipad.
For trip planning, both airstrip info and hotel/transport/local attractions check out
Country Airstrips Australia
Best of luck getting sorted with CASA, or more realistically making plans/schedules in these crazy times!