Dick,
All vehicles going to K'gari (Fraser Island) must have a permit to go to the island. Only four-wheel drive vehicles are permitted on the island and permits must be clearly displayed on the windscreen. All-wheel drives are not permitted as the terrain is difficult and can be rough.
For less than one month fee is $52.75. More if you go further into the island.
Ferry starts at $105. Campers must pay fee and are booked into an area.
So the permit gives permission and a lot of safety rules to follow. Hope this helps.
Aviation legislation indicates landowners permission must be obtained. And remember some councils, etc have bylaws forbidding helicopters landing - and even drones are being banned.
rickshaw.