I'm staying in Valparaiso and would love to visit some of the Casablanca wineries just down Ruta 68, however I don't have a car. Several sites, such as this one, mention that this is easy to do via public transit, but don't go into any more detail.
How can I get to Casablanca via public transit? Where are the pick-up and drop-off points, what sort of schedule do they run, and what are the prices?