Early March (17th) open campsite in Wales/West Wal

My wife and i are picking up our new Camper on the 17th March 2012 from Cardigan and we are desperately looking for campsites that are open during the period 17th to about 23rd March in or around West Wales. Hopefully we can try out our new toy and be in the area (50 mile ish radius of Cardigan) if there are any snags before we return home to Bristol with the van. Any comments/ideas would be really gratefully recieved as the nearest so far is Herefordshire.Hope you can help. Regards Americano Bob