I visited this site on 17th April 2005 and it was very easy to find. Recent visitors had placed a wreath on top of the tallest standing stone and a penny in the hollowed out bowl on top of the same stone.
I’m not sure but I think there may actually be two rings of stone with a gap of only 1-2m between them. I’ll go back some day and have another look at this and edit this accordingly.
This is my very first posting and I hope to make more, detailed postings in future but at least it’s a start!