My wife and I (both retired) are looking for a trip to Australia next year from the UK. We want to 'do' Sydney, Ayers Rock and Cairns and the Barrier reef as a minimum. We'd like stop overs en-route in Singapore, going out and maybe Hong Kong coming back. We'd appreciate some advice as to where we can start to get costings and an itinery. Our timescale is to stay at least a month. We love driving, so this could also be included.