According to my copy of "Bloodletters and Badmen" (a complilation of murderers, gangsters, bandits, and other evildoers of historic note), the Mob held a big conference in Apalachin, NY, in November 1957. Apalachin is near virtually nothing strategic in value, and would be untouched by bombs (but perhaps not fallout--Guido/Nunzio/Fred/whoever were sent out of the cabin prior to the recommended safe time to see if it was dangerous amd may have reaped the benefits of "our friend, Mr. Atom"). The dons and their soldiers, with caches of arms and a strong organization, could be checking out the remains of the cities, looking to cash in on the disruption of law and the need for resources.