Stayed at Tramore, County Waterford in August 2004. Am trying to remember name of camp site. Very friendly site , quite close to coast - myself and girls walked from site where hubby fished off the rocks, caught loads of mackral. Ah, brings back lovely memories, would definitely go back.
http://www.camping-ireland.ie/parks.html
Review all the parks here.
River Valley County Wicklow, v good park, close to Dublin.
Look at Eagle Point, West Cork, always a winner.
Also check, Caseys in Waterford, top class on beach also, like Eagle Point.
Don't forget to leave a review of the French and other European campsites you have visited!