After I had been settled in the van for a while, I realized the wind was coming from the west. That’s odd. So I repositioned.
Now, a few hours later, after dinner, shoes off, reclined into reading position, the wind has decided to mess with my peaceful evening by returning to its usual northerly direction.
So on with the shoes, out into the dust and sand laden air to move the van again.
I suspect the wind will move again sometime during the night.