Oceania
Dear Mark,
sounds very good.
Do not miss Fog Dam in Northern Territories.
In Kakadu NP is a billabong 20 km away from the main road, reachable on a gravel road. There are the biggest crocodile and lots of birdlife ( ask in infomation centre ).
You can rent a boat there or take part in a boat trip.
Brisbane I do not know maybe this page could help You and of course the Australian birdwatchers too ?
http://lamington.nrsm.uq.edu.au/MainMenu.html
I was 2 times in Queensland, but in area of Cairns ( for me the best spot in Australia ).
In New Caledonia I rent a car and use my own tent ( quite save country ).
Near airport is a supermarket, but care the opening times ( not like New Zealand or Australia 24 h, 7 x a week ).
Good place for tent is also near Yate. If You come over the mountains to coast, it is the 2. campingplace. It is on a small bay, with good place for snorkeling. But take care at the reef it goes steep down.
There also some bush and trees, where I saw 2 x Notou and different finches.
Wait for Your reports, especially Vanuatu.
Best regards
Dieter