My daughter's boyfriend took us on a run up Stockton Beach last year in his 4WD. It seems to go forever (32 kms). Tin City is a rather odd structure stuck out in the sand dunes. I think the location was used in the film Mad Max.
The most unnerving part of the sand dunes, which can be quite high, is driving over the top and not knowing how steep it is on the other side.
Regards, Rob.