You did not mention visiting Canberra. It's a very easy
drive from the coast or Sydney to the Australian Capital
Territory (ACT). This is a very new city that was planned
and mostly built in the first half of the 20th century. My
sister and I traveled via caravan (RV) last year from mid
December to mid January. While others who have mentioned the
school holidays as a bit of an inconvenience (more crowds)
it wasn't a problem. We did not make any reservations for
caravan parks, just a hotel our first and last day.
We spent three days in Canberra and were disappointed not to
spend more time there. We loved the museums, parks, etc.
Getting around was easy. I'd suggest to anyone that they add
Canberra to their itinerary.
Santa Maria California