In reply to Duracell: I've seen folk camping outside the Kingshouse on the opposite side of the River Etive. Also, most of the way down Glen Etive. This was a couple of years back, so I'm not sure what the situation is now. Sadly the days of camping outside the Clachaig are long gone. Some organised campsites near there though.
Its free to camp behind the Kingshouse - i.e. they allow it and you can go into the pub to escape the midges. Wild camping in Glen Etive is very nice but sadly it is suffering from overuse, or rather inappropriate use - big groups, fires, rubbish etc.
In reply to Duracell: There's a great camp spot in the flats of the lost valley, or beside the river at the foot of the buchaille. It depends if you want quick access to the road or are prepared to walk for a mile or so. Nobody cares where you camp as long as you tidy up and leave nothing behind. So many people were camping outside the Clachaig that the water was being polluted so NTS discouraged it, doesn't take much ingenuity to find a spot away from eyes though. Tom