The campsite was up the Cwm Bychan valley, and we drove up there, later I would work out we had passed the one on the map, but we ended up at the lake at the end of the valley, and there was "rough" camping there.
A quick vote - water from the stream, one toilet a long walk away , and no showers - but everyone wanted to stay.
After several days doing the tourist thing with the girls we took a day out to climb the Roman Steps to the mountain behind the campsite.