When we first started cruising, the cruises were a mix of destination and opportunity ( good price, timing with minimal leave being used). Now it's destination only.
There are several websites and apps you can use to see if any are nearby.
https://media.destinationnsw.com.au/plan-nsw-silo-art-road-trip
http://siloarttrail.com/home/
https://www.australiansiloarttrail.com/
No idea, I don't follow the books or gamble, but the Swans are 1st on the ladder and the Roos are 2nd last with only 2 wins so far this year. Swans would be favourites.
We have just grabbed a cab/ van with driver at the port after organising itinerary, timings and price. Just make sure you negotiate all three before committing. This was done this at all 3 ports. Research things to do and see at each port (tripadvisor) and compare with ships tours and viatour for ideas and price guides.