I have a cousin who lives in the mountains above Lake Geneva. Gotta tell you, the Swiss keep those roads up like nobody's business - two minutes after the snow stops falling, everything's plowed and clear. There are even long overhangs in avalanche zones to make sure the road stays unblocked. Still, for someone not used to driving them, they might be pretty treacherous. I think you could go with one of the cities along the lake. Montreux, for example.