It's a pretty easy trip, getting to the Bay of Pigs, if you have a car. Take the central highway from Havana going East and take the cutoff taking you South to the Peninsula de Zapata in Matanzas province, about 2 hours from Havana. Not much to see until you get off the highway. Lots of Propaganda Billboards the closer you get to the Bay.
A stop along the highway where a beer keg is converted to a BBQ
....and the Slogans Begin