My 2c worth...
Long time local climbers have a great relationship with NPWS up here in the Blue Mountains. We've had planning and access meetings with them, along with commercial user groups, and for the most they have been accepting of areas that have been developed.
When the fatality occurred near bunny bucket buttress a few years ago NPWS were very thankful that a few of the locals contacted them and offered to remove the shite bolts that had been installed by ignorant foreigners. NPWS had been quoted an exhorbitant fee to remove the bolts by a rope access mob. They were happy they didn't have to pay this fee.
Most locals thought bolting at Centennial Trev wasn't a great idea in the first place. So if I bolted there I'd be heading back out with a grinder and removing my bolts. If you know any of the first ascensionists, maybe you could mention this to them.
Wish I'd gone out there before the closure, that 28 up the arch looked sweet!