I'm actually aware of (some of) the basing in Darwin. Didn't a military-connected Chinese organization acquire a port there also, maybe back when the US Marines started building?

I'm afraid that, given Darwin's location, allied military activity is going to be 'big business'. But the stanadard argument is that China has shown they are going to be aggressive, and that the alliances are much better than facing China alone. But living where a lot of that activity will likely be happening, what is your perspective?

The 'good' news for you, perhaps, is that the US's strategy now is not to concentrate in large bases, which can be overrrun by new and future long-range precision missiles, but to spread out on many smaller facilities.