Just after I replied to the question of "Is finding a double-sided cat's paw rare?", I found the most ever double-sided cat's paws in one location. On Dec., 19, 2010, I shelled at Blind Pass on Sanibel Island and found 40 double-sided cat's paws. Blind Pass is an excellent place for shelling. The toll to get over to Sanibel is $6 and parking is limited at Blind Pass. The fee is $2 / hour to park your car.
I've been in love with having sand between my toes since I was a teenager taking the ferry across the bay to arrive at Presque Isle State Park (aka The Peninsula) in Erie, PA.