Stonehenge and the recumbents [it's all about the recumbent at them- i've been to enough] are not true stone circles and the recumbents do seem to have had a fire at the start [probably to clear the ground]. It really does seem to be different where you are in the country which suggests different things were going on all over, therefore it was probably very regional as to what went on , i can almost hear the dancing feet down here in cornwall.