In reply to Jenny C:
There is a significant risk of being eaten alive if you camp.
Having said that, the Sligachan campsite is cheap, cheerful and opposite a pub. You will be spending a lot of time hiding in there as the site itself is a midge infested swamp.
Glenbrittle camp site is by the sea, less midgy under most circumstances but more expensive and remote.
I have had a good time on both of them but take deet, coils and a head net. IIRC they sell nets at the Sligachan bar but they are ruinously expensive - classic sellers market.