Hi Andrew,
I think most parties still tackle The Thumbs from the eastern side (we only did it this way to combine the 2 peaks), it was reasonably easy from the west tho & would probably make a fairly casual over nighter with good camping on the Clear Hill Plains (water available from little creeks + still clear after fires early last year). Our descent route off The Thumbs was far easier than our somewhat misdirected ascent (see article); just easy clear button grass leads, a bit of scrambling along the ridge itself & a pad up to just below the top where some slightly trickier scrambling was required, nothing that bad tho.
Mt Wright is pretty straight forward - cross the Gordon (as if heading to Rhona) & not long after just pick a clear lead across the plains & head uphill, not much scrub at all really, just lots of buttongrass again, & lots of uphill. Walking along the tops is delightfully clear & easy; this one is a fairly easy day walk allowing for full exploration of the mountain & it's features & a wallow in the Gordon on your return if you get a clear hot day like we did.
Great area
Stu.