Our friends stayed there a few years ago and we visited them so it did exist but i do not know if it is still there, it was a little way out of can picafort in a tree lined area with fixed toilets and showers. Hope someone else has more info for you.
Steve.

http://www.francecamping.com/camping-fiche.php?id=8056&region=BalÃÆ'©ares&pays=espagne

Not great link, but will tell you what's on the site.