Well, at least she warned the Balladeer that this might happen. Their plan accounted for this possibility. Greta picks her way down to the closest path and chooses a direction at random. Trying to find Johnny is probably the surest way not to, so she doesn't bother puzzling her way back to where she left the Balladeer in the hopes of retracing their steps. Instead, she just keeps up a steady pace, calls for Johnny every few minutes, and tries to wring some feeling back into her hands.