I have considered to see a bit of southern Australia for 5 or so days (still open to add a day or two) as part of our Tasmania visit (Have posted on Tasmania site for that part of the trip) in mid-April. We plan on driving from Melbourne to Adelaide then off to Kangaroo Island.
I have read some posts about the drive between M to A being 12 or so hours and sites along the way. We plan on stopping and staying along the way. We tend to like culture, wildlife, and outdoors over beaches. Also, hotels are not our #1 places to stay, we tend to lean more on B&Bs or unique rental places to feel more localized.Edited: 11:10 am, July 08, 2013