There used to be a resort on Little Water Caye, but I can't say there was any camping.
It was a privately owned island and Little Water Caye Resort was there and the cabanas were over the water with long walkways to the cabanas.
We went there before the sale of the caye. The owner was a German fellow named Karl and the caye was south of Placencia.
Is this what you were seeking?
Iris took the caye resort down.
It's now a preserve, I think