VISITS to New South Wales by three royals and a president would generate priceless international publicity for the state's tourism industry, Premier Bob Carr said today. Australian-born Crown Princess Mary of Denmark and her husband Prince Frederik will today attend a state luncheon in Sydney as part of their trip to Australia. Israeli President Moshe Katsav will arrive in Sydney this morning, and Britain's Prince Charles, who is due to arrive in Perth tonight, will visit Sydney on Friday and the NSW town of Gunning on Saturday. "While we are honoured to host the tours, there can be no underestimating...