Gary Lyddieth left Mornington, Victoria on 26 April 2014 bound for Western Australia.
He was driving a white Nissan Urvan campervan with the Tasmanian registration number A938Q.
He failed to attend a pre-arranged meeting with a friend in Carnarvon on the 6 May 2014.
Gary was last seen in Meekatharra on the 3 May 2014 when he obtained directions to Gascoyne Junction from police.
If you have information that may assist police to locate Gary please call Crime Stoppers on 1800 333 000.