Peter and Sally Kable, a retired couple from Kiama, New South Wales, are taking a typical US road trip this summer. Starting in California, they have travelled halfway across the country since early June, arriving this week in the sleepy farming centre of Richmond, Indiana.

What makes the Kables unusual is that they are driving a 1915 Model T Ford, which Mr Kable has fitted with an exact replica of an outdoor camper – including two comfortable beds – made by the St Louis brewer Anheuser-Busch during Prohibition in the 1920s.