Just in case anyone has or may have my dillemma this information may help them. After my queries on the Forum concerning coming back to Brisbane via Perth,today I finally got a hold of "Pacific Blue" and spoke to someone who totally understood my dillemma re flying from Denpasar to Brisbane via Perth. He checked first and told me - We get "both" boarding passes in Denpasar, clear customs in Perth at Terminal 1, catch an orange bus-called a connect bus (complimentary as we are on-flying) which takes us to Terminal 3 to catch our domestic flight, checking in our luggage at least 45 mins prior to flying. This works out fine as we can buy our duty free, pack it in our suitcases (taking out other purchases to make way for it),get to domestic area, have coffee etc with our close friends for an hour or two and then fly to Brisbane. . Thanks to all for your previous helpful input.