Well that was the Burl point you have previously made, that I mentioned; too few families groups in the area. Subsequent events seem to suggest large gatherings COULD be mustered, perhaps from far afield. "Too few people" is certainly not a strong plank for asserting the sarsens were moved by a limited group IMO. It's miraculous enough without adding a second layer of miracle by postulating it was done by a much smaller group than looking at it and applying common sense would suggest.