Old Dave replied:

Straight drive to Karijini via GNH about 14 hours. You haven't said if you are planning on camping or are towing a caravan and ages of your children these are all factors that have to be taken to account.
GNH pretty boring we just did the trip thru The Midlands Rd via Mingenew, Coalseam NP, Mullewa, Yalgoo, Mt Magnet GNH to Auski Roadhouse. Karijini absolutely fantastic.

Old Dave replied:

Martyn
There are bush camping sites in the Coalseam Park, we actually stayed at Mingenew CP,we like our hot showers, am trying to add some photos to places site please bear with me.
Coalseam was very pretty with wild flowers at the beginning of September when we were there, but may be beginning to die off now. If going thru this way and via Yalgoo stop of at Jokers Tunnel just outside Yalgoo something different to see, you could also bush camp here.
Regards Dave

Motherhen replied:

As you head up north of Meekatharra on the Highway, there are a couple of wells from the stock route days, and tributaries or rivers, all of which offer good camping opportunities (no facilities).

Member - lyndon K (SA) replied:

Are you guys talking about the Hamersley Ranges? :)
Sorry but i can't get into these name changes, bit like having a mate called Bob who changes his name to Charles, you will always think of him as Bob :)