We are seniors in our late sixties travelling to Australia from Canada for our first visit in May '14. We would like to travel from Melbourne to Adelaide via the Great Ocean Road. Are there any tours that would give us an overview of the topography and sights without a lot of rigorous activity? We are not interested in camping which several tours suggest. What about a train journey? Or should we just opt for a day trip on the Great Ocean Road while in Melbourne and fly to Adelaide? Any suggestions would be appreciated.