Decoys

On the drive to Virginia yesterday, we passed a sign on I-95S, just north of Havre de Grace, MD for the Decoy Museum.

So my question was whether this was a museum dedicated to decoys or a fake museum to keep the real museum hidden from prying eyes?

If it was the second, why tell everyone?

If it was the first, who would go to it?

Seems like a no win situation to me.