The last motel that the 3 stayed at in the movie is located on Werna Street, Winton, Australia. The building has changed very slightly in appearance (as in 2008), the staircase that we see Sophie walk up and down is not there and a small new building is now situated where Taylor parked the van on arrival.
The movie was shot in sequence / chronological order.
When heavy incessant rain affected the shoot at Garie Beach in the Royal National Park of New South Wales, one British crew member, actor Shaun Evans, commented that it was just like being back in England in Blackpool on a wet winter's afternoon.
When the production arrived in in central western Queensland for shooting dry and dusty outback scenes it rained for the first time in three months.
During the film, after the accident with the kangaroo, they get towed back to the nearest town. Their exact position is on the intersection of Swan Street and Parrot Lane in Longreach, QLD, Australia, right next to the double power poles. In the first shot at Longreach, the building on the left with red on is the Holden dealership.