[borisbg]

I don't know the situation in AU, but here in the states Indian Reservation  are controlled by the tribes.  If the tribe decides to close given area for public use it will be closed. There are cases where the reason is preservation and there are cases with political motivation in the spirit of  "enough was taken from us".  I respect their decision regardless the reasons, after all it's their land.  Given the popularity of this location I would think  AU Parks & Recreation would work closely with ingenious people  to make it accessible in more regulated fashion.
I find it  overwhelming being between so many people in the outdoors, it defeats the purpose.