Just been reading the problem with getting fuel at Ceduna without a BP carnet. Since then there has been a credit card bowser put in at Wudinna (YWUD) which is not far from Ceduna. Also at Kadina (YKDI) . Flying across the Nullabore should not pose a problem now if you don't want to pay a callout fee. Another thing you can do if you fly regularly is ask your nearest BP refueller if you can open an account with him and get a BP carnet through him. He gets the sales on his account then bills you. Good for him and you. Works for me.