Hi Rob
Was up that way on the weekend, did an overnight trip to Mt Picton staying at Steanes Tarn. Great spot with terrific views.
The track to Steanes Tarn is much as described in the Chapman book; spend the first few hours or so slogging it out through pretty thick wet forest, with lots of slippery, mossy logs, rocks and tree roots. Plenty of fallen trees that need to be climbed over/under too. A couple of slippery creek crossings and a small amount of horizontal to push through. Being an un-managed track, I doubt its seen any work for a fair while. It is steep in parts, but there are 2 spots where a rope has been installed to help out. Despite it not actually raining at all, we were soaked by the time we reached to top. After around 3 hours, you suddenly emerge out of the dark onto the ridge above Glassworm Tarn/Lake Riveaux. From there, you follow the ridge up to Steanes Tarn for another hour or so, crossing a small boulder field nearing the tarn. Again, the track is a bit overgrown but overall pretty easy to follow, being well taped in the forest, with some more tape and cairns up on the ridge. From the tarn, there is a cairned route to the top of Mount Picton. It starts above the tarn and heads to the right around the face, before swinging left up a grassy gully towards the top. I guess its another 45min or so from the campsite to the top, stopping plenty to take in the views of course
Also, unless you have a decent 4WD with good ground clearance, you'll have to park about 1km from the track start and walk like we did as the West Piction Spur 1/2 road is washed out in places and has a tree down. We parked at the intersection of West Picton Spur 1 and West Picton Spur 1/2, where there is enough space for a few cars.
I haven't done the range traverse, but in good weather the views would be awesome. In bad weather, they would be of your feet
Cheers