Please help me decide which pass is best for the following trip: 2 adults land in Zurich, 5 days hiking Bernese Oberland, 5 days Black Forest, 4 free-to-go- anywhere days mixed in there, then back to Zurich. Swiss Pass Fall Special? Add Bernese Oberland Pass? Eurail Pass for Germany/Switzerland? And I know about KONUS Card in Black Forest Thank you for any guidance you can give.