Bingley - you are going to one of the safest places in Europe, and probably in the world. I think that it's very unlikely that you will have any personal safety issues, or any problems with credit cards.

I have travelled to a LOT of very scummy places (especially Africa) and nobody stole any credit card information there. Of course, I was watching to ensure that nobody stuck a knife between my ribs. But I think that you will have an excellent time in Switzerland. Other countries in Europe are more of a problem, but not where you are going.

Your biggest problem is the HIGH prices for everything. I would tell you to pack some peanut butter so you can make sandwiches, but I don't think they will let it into the country.