Funky Monkey, If taking are group of inexperienced walkers up the Tourist Track, a good place to start is Achintee, the Ben Nevis Inn is there and is reasonable priced for a pint and food when your're finished, You will need to give yourself around 8 hours for the round trip, I would make it an early start and you can be up and aroung half-way lochan (Lochan Meall an t-suidhe) before the general tourists. The zig-zags will prove tedious but if you stick to the well worn paths you will be ok. Warning - if you get clagged in and need to use the compass on the summit plateau then you need to use the bearing here:
http://www.mountaineering-scotland.o...s_bearing.html
This will stop you from veering into Five Finger Gully which is where the majority of accidents happen.
Lastly enjoy yourself and publish some photos here when you get back, if the weather is bad the the Ice Factor in Kinlochleven is and excellent wet weather alternative:
http://www.ice-factor.co.uk/
laters
Duncs