Most exciting, MA. And, to think that it is only a mile down from where you live!

I have been to see King's Quoit in Tenby, Pembrokeshire as well as the Pentre Ifan in Dyfed. When I first visited Wales during the courtship days of my SIL and daughter, her future in-laws took me to Preseli, which apparently was the source of the stones at Stonehenge. I surmise that the Picts held sway in Wales as well, even if only mostly in the north.

Do post about it when you return from the visit. I'd be most keen as one rarely comes across archived reference on Pictish culture. Quite a damper when one is amongst Welsh speakers and interested in learning the various influences on the Welsh language.

In the meantime, I wish you pleasant weather during your visit to the site.