Hi JG,
I was also in YBDV, I flew in Thursday & left Monday. It was a very windy day for arrival on Thursday with a strong X-Wind blowing on our arrival.
We tracked from Bindoon (Perth) to Kalgoorlie-Forrest -William Creek -Birdsville, coming back we went direct to Coober Peedy - Forrest-Kalgoorlie-Albany, West to East great tailwinds at 9,500 around 35-40kts.
Cheers