Hi, many thanks to all who replied to my earlier questions. I still have more, though. Here's our itinerary so far: 2 nights in Zurich, 2 nights in Luzern, 2 nights in Lausanne, and 6 nights in Murren. We don't want to spend less than 2 nights in a location. We're 2 adults and a 13yo. We want to do all kinds of walking, hiking, boat-riding, city-visiting, museum-going, etc. We will not have a car.
I don't know what our travel order should be. We're flying into Zurich and will be leaving Switzerland via train to Venice. Does it make more sense to leave Murren to last so as to take train to Venice from there, or is leaving all the high country hiking to the third week of September more risky because of weather?
Second question, what is the best train to take to Venice? Is there a direct one from Switzerland or do you have to change trains in Milan? About how long should it take? We need to be in Venice before 7pm on a Saturday.
Third question, we're two adults and a 13yo. We're only using public transportation. Since we'll be traveling almost every day by some kind of public method (or visiting a museum), I'm guessing the 15-day Swiss Pass would be best. The 6-day Swiss Flexi-Pass seems too constraining and complicated when it comes to last minute usage. I need to buy the Swiss Pass in the US ahead of time in order to add our child for free, correct? Also, can you help with trying to figure out if the Swiss Card would be better? It's much cheaper but covers less.
Again, thank you to all for your help.