I vivited this site last year as part of my on-going attempt to visit every CADW site. The mound is just up the road from Valle Crucis Abbey (another CADW site) and can actually be seen from the Abbey. The mound is quite small but in a flat field with a cross on top – so easy to spot.
Probably best to park at the abbey and walk back down the road to the mound as parking is not easy and the road is very busy.