" but there is a footpath, where the road ends and the path begins is where I parked right next to the house after asking permission, then just follow the path with woods to your right and fields to your left, take left branch on the path and your there ".

Thanks for that, did go down that lane, but rather nervous about going down private driveways. Really it should have better access - if anyone from CADW is reading this - it looks a beautiful classic site and the public footpath should be marked at the beginning of the drive....