I wish to visit the Fortress Furigen on the weekend of the 2nd April 2013. I would like to catch a boat from Lucerne but not sure if boats go from Lucerne to Stansstad that time of year. If I need to catch a train from Lucerne to Stansstad what stop do I get off at in order to walk to the fortress? Is is a long walk from the station? Thank you in advance for any information.