Great stuff, Sjef! I can't see the route at the moment but will try again on the laptop. From your description, it will cover an excellent range of landscapes and riding to get a flavour of the country! The Snowy mountains (Kosciuszko) in October could be anything from spectacular perfect weather to still snowing and miserable- but most likely to be perfect. While we call them "mountains " they are more like rolling hills if we are at all comparative, but the riding is great and the scenery and bush unlike anything you've seen before.
I'm just out of Canberra not far from the the Snowies so will keep an eye on your planning and see if I can be in the area at the same time. Also feel free to contact if you need a hand.
Do you know yet what type of bike you will be on? If you don't mind a little bit of good dirt roads there are heaps of extra options for route planning.