Hi Stoneycreek
I've done both ends of the walk you mention (4WD along Jefferies Track, and also walking from Mt Wellington along East-West Trail as far as Mt Patrick).
Given you've probably completed your jaunt by now, this might be old news... but here's a few thoughts from a walk I did about 10 yrs ago.
Going from the Mt Wellington / Big Bend Fire Trail end, there is a route over Mt Connection which joins back up with the East-West Trail and cuts off a large detour on fire-trails (this is marked on the 1:25000 Collinsvale map).
A number of peaks are easily accessible from the East West Trail, including Collins Bonnet, Trestle Mountain, Mt Marian, Mt Charles and Mt Patrick. Most of them are either following a cairned route or choose-your-own-adventure through the scrub (the hardest bit we found was getting to Mt Patrick).
Water may / may-not be an issue - there are several small dams along the fire-trail, we camped under Trestle Mountain near a running creek from where we got all our water.
Other than that, its a relatively rarely visited part of Mt Wellington, and still quite spectacular views.
Cheers
Kramster
