The band began a proper national tour to promote "Long John Silver" in the summer of 1972, their first in nearly two years. Shortly before the tour commenced, David Freiberg (who had recently completed a prison sentence for marijuana possession after leaving Quicksilver Messenger Service) joined as a belated replacement for Balin. The East Coast leg of the tour included a major free concert in Central Park that drew over 50,000 attendees. They returned to the West Coast in September, playing concerts in San Diego, Hollywood, Phoenix and Albuquerque. The tour culminated in two shows at the Winterland Ballroom in San Francisco (September 21–22), both of which were recorded. At the end of the second show, the group was joined on stage by Marty Balin, who sang lead vocals on "Volunteers" and the final song, "You Wear Your Dresses Too Short."