In reply to Stephen L:
I've done it on a mountain bike.
Didn't carry axes or crampons, although did think if it got that bad, I'd just strap my pedals to my shoes, but there wasn't actually any snow at the top - at least, not on the main path.
Definitely echo the big jacket for the summit camp. It was really windy and the chill was pretty fierce.
Honestly, you probably don't need a porter, though.
Post edited at 16:58