I've been to Callanish and stopped overnight in the back of a van on the visitor's center car park and there was no bugger there at all from about 6pm onwards.
When we went we stayed overnight at the Doune Braes... but Calanais was full of coaches and people nearly every time we went over ... I expect the cottage doesnt sit on top of the car park anyway, but I just cant remember - it as a while back... in fact when I was there last the cottage was still all run down and wasnt rentable anyway
Just hope we can go and I dont need to shelve the plans til 2011!!