In reply to pmjwales:
St Petrox is the best campsite, though it is about 2 1/2 miles from Bosherton. 3 toilets with bog roll 2 showers (free hot water) last time it was £5 per tent (small) £8 tent (large) ..that's per tent not per person ... it's the best deal around when you get 6 people sharing £8/night also has a fridge/microwave... Farmer is fine (Billy) just pay up promptly as per the signs don't take the piss... and he's really very helpful... sells milk, eggs,bread etc.
If you want to be closer ie. Bosherton itself them it's just a field/water use public toilets near the lilyponds entrance.
If you've got a van/camper, some people crash in the car park above the old chapel.