The outback would be a sure bet this side of winter; cool to cold but drier than down south. The colours of the outback are far removed in winter from summer: it turns green and you know as well as I do that Vaudeville Velvia just loves playing with greens!
I will be in the outback beyond Broken Hill and then up to Quorn (south side of Flinders Ranges) and down to Burra in September, one month. Near BH early on, staying on two stations ('Belmont Station', outside Silverton, and 'Eldee Station', on the Mundi Mundi Plain). The former Station has a prop of interest that was used in 1980s 'Four XXXX' beer commericals which I want to incorporate into star trails.
Meanwhile, the Otways are getting delightfully wet at the moment (Forrest flooded yesterday!) — bodes well for the very long and boring dry that left many beauty spots parched. Planning a solo walk to A.B. Falls and Staircase Falls (scrubby circuit, re-taped and routed earlier this month) early-June if it is of interest to you, with a crash at the Forrest Brewery, but expect to get wet and be covered in sticky clay from Curtis "Track". Bring skis. Better than walking...
Other places you could consider are Wilsons Prom (peaceful in winter; rent a cabin); NE Victoria (based in Bright; visit lower forests of Buffalo e.g. Rolly Falls), East Gippie, as Boots suggested, Portland for the unusual rock strata around Discovery Bay...the Grampians (my destination next weekend)...many places.
Creativity can end up in the doledrums if you don't frequently get out to be stimulated. Must always remain active with something to do in photography — even if it's buying cameras: a natty trick I picked up from Boots when times are quiet . "You never can have too many." Hmmm. Who said that??
I didn't know you spent time in the outback. That's interesting. Pity it's so far away. You'd need to drive for 7-8 hours to free up enough time for the rest of the week to weep and wail and wander through the ghostly open nothingness.