In reply to martin.p65:
I'm not familiar with the summits yet around the Nevis Area, I've come up to Scotland for two weeks with work amidst the storms we've had, so I've done quite a lot of lowland walking in the area.
You say your friend is injured with his shoulder, I'm just thinking if he slipped and fell in the snow his injury might be made worse ? and the others are inexperienced, with no ice axe or crampons, weather is set to get colder, we've had snow down to around 500mtrs, perhaps by the time you come up the snow will be much more the common theme, so with this in mind, Instead of a peak in winter with your friend's, how about exploring the Nevis Glen ?
Around Steall Falls area and beyond, a great lowland walk into the Glen along the West Highland way from Braveheart Carpark, or from Cow Hill to Braveheart, carry on into the Nevis Glen via the Nevis Forest on Forest Track and at Achriabhach pick up a track along side the River Nevis to Paddy’s Bridge, then past the waterslide and to Steall Falls, lots to explore there and you'll have a full day out too having to walk back. I measured it as 23 miles. Not much climbing but felt I’d came away enchanted having been in the Nevis Gorge and the falls, superb scenery.
Hope I don't come across as being rude ... offering a lowland walk instead of something high in winter, I was just being mindful with the restrictions of equipment and your injured friend.
It's an option anyway
All the best
Jase