I reckon whatever route you plan you can't go wrong. We went in Sept 2010 and loved it.
Melb, across Nulla, down to Esperance, then generally following the coast around up to Monkey Mia, back down and inland to Mulleawa, York, Wave rock, Kalgoolie and back on the Nulla to Melbourne. We had 31 days to do that, still saw heaps, but soooooo much more to see and do. Just a taste.....
Figure out what you really want to do and plan around that. The missus wanted to 'do the wildflowers', kids Monkey Mia, me Kimberley etc and we just worked out what else we could fit in. Obviously I didn't get my wish and get to go the Kimberley (but I'm not bitter :mmph::mad2
- the distances are vast so you have to be realistic as to what is important, and of course what the little tackers can handle.
Take a troll through the trip reports, especially Aremacs 1/2 lap and PMKs xmas trip