We are a group of 4 adults from the US travling from a few nights in Sydney down to Wollongong to visit our daughter who is attending the University there. Afer 3 days there, the five of us are heading back to Sydney for a side trip to Cairns. We are a bit apprehensive about a car hire as have no experience driving on the other side of the vehicle and road. Daughter is not very familiar with the trains but said it took her @ 2 hrs to go from Wollongong to Sydney. So I guess am asking for suggestions. A car may not be practical because of all of our luggage but how cumbersome is it to travel by train with luggage? Would the cost of the train for all of us from Sydney and back and then all of the other sights we travel to in Wollongong be more costly than a car? We would be heading from a Sydney hotel (not the airpot) on a Sunday evening and returning @6pm on Wednesday. Can we expect loads of traffic at this time? Your thoughts and insights are appreciated.