If you join CREW, through Longreach, you will get private health cover in Australia and only travel insurance outside Australia.
If you join CREW direct you will get 100% coverage for your whole family anywhere in the world through Aetna Global. It's great insurance. Pays 100% of most procedures/visits (except dental, usually 75% I think) Did I say it's great insurance.
CREW will provide loss of licence cover for 2 years. Costs approx $120/month I think. At the moment 3 month waiting period. They are currently looking into a shorter wait but slightly higher premium.
Hope this helps.