Road Closures between Yulara and West MacDonnell Ranges.

I notice that many of the roads between Yulara and the West MacDonnell Ranges are currently closed due to flooding (Mereenie Loop, Luritja Rd, Larapinta Drive etc). We were planning a trip there during the school Holidays and I am wondering if anyone could make an educated guess about how long the roads are likely to remain closed. Are we talking a day or two, or are we talking weeks?
Our plan is to drive to Yulara from the South Australian Border via Mulga Park road on Monday the 14th of April. Drive from Yulara to Kings Canyon on Thursday the 17th. Drive from Kings Canyon to Palm Valley via the Mereenie Loop on Sunday the 20th. Drive from Palm Valley to Redbank Gorge, Glen Helen or Ormiston Gorge via Gosse Bluff on Tuesday the 22nd and then head back toAdelaide departing Anzac Day.
We will be flexible and stick to the bitumen if we need to, but I would really like to complete this trip after having to cancel it in 2010 after rolling the car on Mulga Park Rd.
Any local information anyone could provide would be gratefully received.
Thanks