Dedicated Gas, or Duel Fuel????

We are at Barcaldine Queensland, and the trip from Roma has again shown the need for LPG powered vehicles to be duel fuel. At Roma the BP Service station assured us that auto-gas was available at the BP at Auigathella, however we found the bowser out of service, pushed on to Tambo, and once again, the bowser not working, so we did get LPG at Blackall but at 484 km from Roma, we were waiting for the engine to stop, and would have then needed to run on petrol. At Blackall the BP station had a diesel bowser out of order, and it had been for over a month, so it seems that the problem that existed two years ago, in regard to not enough maintenance crews from the fuel companies, is this something for travellers to be wary of.