In reply to DaveX:
We just did it three weeks ago and used a more unusual system, blagged from the SMC guidebook at the last minute. We were two with one car as well and were a bit worried about calling a taxi to come pick us up in Glen Brittle. We did the ridge north to south, but something similar should work if you want to do the ridge from the south.
We parked at the Fairy Pools at the head of Glen Brittle, just 5km north of the campsite. We walked north to the pass and then up into Fionn Coire to the foot of Bhasteir tooth. We left most of our kit here, skirted round Am Bhasteir on the north side, climbed Sgurr nan Gilean. Came back down the same way and started the traverse picking up our kit. When we finished at Glen Brittle I planned to hitch back to the car, while my wife kindly kept an eye on our packs.... Hitching wasn't really going very well and I was really looking forward to completing the fully ethical Cuillin Ridge circuit when a nice French lady picked me up about 2km short of the Fairy Pools.
When you look on the map it is not a whole lot longer from the Fairy Pools to Sgurr nan Gillean summit than it is from Sligachan. Anyway it worked for us and it was good fun.
Post edited at 21:05