Emmerson,
Can beat you by about 10 years! I was born on the Gower, and most of my courting days were spent around Three Cliffs/Pwll Du/Oxwitch/etc ! We stayed at the Three Cliffs camping site 2 years ago, and I was impressed to find how little the area had changed in over 30 years since I last visited.
As for the campsite, as Lynnybobs says the individual shower/toilet/washbasin enclosures are superb. (Have they now also replaced the somewhat dated 'old' block?).
.
(You can always approach the bay from the valley. Shepherds shop is still there, though (inevitably?) a poor image of its former self).