Hi,
ExploreOz have a reasonable set of maps for the States or the whole of Australia at 1:250k and designed with 4wd in mind. They are good for an overview or road driving.
I tend to use a variety of scales depending on what I'm doing.
The Tas 1:25k maps are now dated but still usefull.
I'm waiting for a set of 1:50k to fall of the back of a fire truck.
Cheers
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