I headed up to the stones on my first evening on Lewis not realizing it was summer solstice, you couldn't get a good picture for hippies and druids ringing bells, banging wee drums, paying whistles, humming, telling stories of the unexplained power in the stones, etc, etc, etc. Think there must have been a bit of bong action taking place.
I have returned on a few occasions and eventually managed to get some shots. Think the hippy camp is still there though, I assume the chanting must only take place around or on the solstice
Peace Dudes :-)