I was there last year for a historical festival. Not the easiest site to pitch a tent on, with the bedrock about two inches below the turf and the wind howling across the top of the hill, but we managed it in the end. There were Romans, Victorians, Iron Age Celts building a round house, and us medieval Welsh - and fifteen local schools had built giant puppets to perform a play about the history of the site.
It also has quite a nice pub inside the hillfort.