Well done new-dawn and Olddandare - joint FTF very quickly after publication, at late o'clock!
There is no need to enter the station (unless you want to). I would suggest that you do not park on the main road (Cardiff Road)– there is parking on side streets.
The village of Dinas Powis has two railway stations, one at either end of the village with Eastbrook station at the Cardiff end and Dinas Powys station at the Barry end. Both stations are on the same Vale of Glamorgan railway line operated by Arriva Trains Wales. Monday to Saturday daytimes there is a fifteen-minute frequency northbound to Cardiff Central and beyond. Southbound three trains per hour to Barry Island, plus an hourly service to Bridgend via Rhoose.
According to the historian John Davies, the name Dinas Powys (and its earlier spelling 'Dinas Powis') is derived from the Latin "Dinas Pagus" — meaning "city of pagans" [This is incorrect, of course. A 'pagus' was a Late Roman local regional description, the equivalent of a modern district council in Britain, and the kingdom of Powys derived its name from this, pagenses, '(land of the) country dwellers' or 'people of the pagi'. The root for Dinas Powys is the same, and means fort (dinas) of the country dwellers or the people]
Please replace where found, so the hint can help other