I was checking Rick's Festival calender and realized that Jun 1 (Monday is a religious holiday: Pentecost). At that time, we will be in Interlaken and was planning to take the cruise on Lake Brienz. Would anyone know whether they operate during holidays?
You can check this out at the Swiss Rail web site: www.sbb.ch/en Enter June 1 as your travel day, and select "boats" as an alternate form of transport.