In reply to Rick Sewards:
Hi Rick,
I've got a copy of Guillaume Charton's Queenstown Rock, Ice and Mixed guide that I purchased back in the day. It's got the Grand Traverse in it, described in detail. If you PM me your email, I'll photograph the pages and send them your way.
We did it in summer conditions (on Christmas Day, actually) and, while having ropes and gear, found fun un-roped scrambling all the way (competent but in no way exceptional climbers that we were). Roping up/moving together/pitching definitely looked possible if desired.
However, after the last peak, you initially descend via a gully that often holds snow. I remember it having abseil bolts and we got the rope out and abbed down it before pottering off down the snow slopes below.
It's an excellent day out!
Cheers,
Joyce