In reply to Doghouse:
Biking in - don't do it if you've got a full winter pack, it'll break your arse.
DO do it if you're going lightweight - take normal track up, but where it crosses old railway track (?) not too far into the walk in, turn left rather than cross track. Follow this to forestry road. Turn right. Follow this to top car park.
Either:
1) stash bike (use a lock....my mate had his bike "borrowed" from a long bike in once by someone. They left it at the end car park mind you, so better than stealing I guess, but he was a bit pissed at someone having stolen his easy ride out).
2) get over the stile and bike as far as you can due to snow/fitness/can't be arsed pushing any forther then stash bike.
The descent from CIC hut to top car park is, in my opinion, one of the best singletracks in the country. The descent from top to bottom car park via walkers track is quicker on a bike than the forestry roads in a car. I've vowed never to go up the Ben path on foot again.
Enjoy!!