I agree with the above. Check the SA roads website daily.
We did the Strezelecki to the corner on Tuesday. All roads open and the Strez was in great condition except for some corrugations on the section between Merti Merti and the corner. BUT, Light rain over night meant all sorts of roads were closed the next morning. We took the middle road through Sturt NP as it was still open but I reckon it should have been closed too. Little warning before we hit thick mud. The missus was driving and did well to keep the trailer from jackknifing. It was only a short section and we didn't get stuck but it was pretty hair-raising there for a while. We the took the silver city hwy north from there to Noccundra and it was fine.
edit: spelling