In reply to 99ster:
I've been there a few times in mid-October, mostly to climb icy couloirs high up. I've been fortunate because the winter snow hadn't arrived so we could get about on foot without snow shoes or skis - but a couple of early winter snow falls would have changed that. Whilst a good snow fall would help your snow holing ambitions, it would also make conditions very dangerous for solo travelling and I wouldn't recommend going on the glaciers alone in October. The range will not be busy, and as 99 mentions above, the cable cars may close at short notice, especially mid week.
I hope that you enjoy it......Jeff