I suppose the Aussies will have to work out what to do about the gaps left by GM ( & others) pull-out like what happened in Flint.
The GM Flint South Plant is being expanded, but otherwise there are huge vacant lots around Flint including "Chevy-in-the Hole" in the centre.
Flint is becoming a college town with at least 4 universities, and recently I heard thare are 30,000 + students here and the number is growing.
At least 30% of the houses were derelict and they are progressively being demolished and the vacant land being turned to grass or left to re-generate.
The best time for Aussies to visit Michigan (especially if interested in auto history and film) would be when one of the car weekends is on in mid-late August. The Dream Cruise at Woodward in Detroit is the biggest.
In Flint we have the "Back to Bricks" in August, sponsored by Buick.
Here is a photo I took with a home brew 6x7 last year using the Takumar 6x7 90mm Leaf shutter , and Ektar 100 home processed in Digibase.
https://app.box.com/s/mbi6jx0kykx6ga1h6as30l1xibslqy2n