At the time Giancana was also in the country from 1966 to 1974, but he mostly stayed at his home in Cuernavaca not Acapulco.
I always wondered why he chose that area of Mexico over all the gorgeous areas near the Caribbean sea. Weird choice on his part.
Cuernavaca was also a holiday destination for the inhabitants of the Valley of Mexico for centuries : for the Aztec monarchs, for the Spanish colonizers, and for the modern-day residents of Mexico City.