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Cards are rarely used at point of sale in Switzerland, especially in small villages. As there are only 2 ATMs in the town, have cash handy.
Remember that Switzerland takes Swiss Francs, not Euros.
During low-season, March-May and October-December almost all of the village is closed - most hotels, tourist information, local shops etc. If you visit during this time it is good to remember that the International Scout Centre is open 365 days and the office provides tourist information, maps, catering as well as accommodation.