Middle of England for us - near Wakefield/Leeds, West Yorks.
Not quite the open country you live in, but we have travelled as far as Morocco through France & Spain, Ireland to do the southern half of the Wild Atlantic Way, and the Inner Hebrides, all in our Carawagons.
We also camp in the Yorkshire Dales and the North Yorkshire Moors, so it's not all urban jungle here
I lived near Adelaide (Athelstone) for 8 years as a kid, returning to the UK in 1971, and I remember one trip in particular there - Adelaide to Sydney via the highest mountain in Australia, Mount Kosciuszko where you could drive to within 100 yards of the summit! - first time I'd seen ice in Australia! Then on to the Princess Highway and up to Sydney, so probably came quite close to your place. All of that was in a VW Beetle, towing a home made bedframe trailer with a big, heavy military tent!
When we get back there we usually travel to Perth and Hobart where we still have family, and Adelaide where we still have friends, but usually try to get 2 or 3 weeks travelling in as well, around Tasmania, Adelaide to Melbourne via the Coorong & coast road, Kangaroo Island (the year before the devastating fires!), Sydney to Byron Bay, and Cairns/Port Douglas.
Of course, all our travelling there is with hire cars and hotels/motels/AirBnB when not staying with family/friends, so no chance to explore the real outback
Send more pictures when you get out again - the gum trees bring back great memories for me, and I can almost hear the sounds - warbling magpies, kookaburras, forest ravens, budgies, cockatoos etc. from my childhood