We are also a middle aged fit Australian couple hoping to drive across America in late 2011.
We are taking a cruise from Vancouver at the beginning and hope to take the train across the top of America back from New York at the end.
We have been down the east and west coasts so we want to see more of the middle. How long would it take us to have a leisurely trip from say Seattle down to the Grand Canyon then more or less wind our way East? Finishing in New York for a week at the end. We do not need C&W music /cowboy stuff. We do like museums and just want to experience the scenery which we see in the movies!!! ( but not hot dry desert we have enough of that here) I want to see the autumn colours and mountains without having to drive over too many! And basically see the countryside/ rural areas.
Hope that is not too garbled - would four weeks be enough?