Hey Steve, and welcome to Aussie Forum, and have a great time while your here. You have picked a beautiful time of year to travel, "specially Tasmania. Have fun.I've travelled thtry pretty much overm but mate my recommendations would be as I;m an old bugga.
Welcome,
A trip across the Nullarbor to WA will stick in your mind forever, makes your Lonely Highway 50, look like a walk in the park. Enjoy your stay in OZ wherever you go.