On the “mySwissAlps” page for the Swiss Travel Pass, it states:
A seat reservation and/or supplement is required to travel on some trains/buses/boats such as Glacier Express, Bernina Express, Gotthard Panorama Express and Palm Express.
Is this for ALL trains that run on these routes, or for special trains with panoramic cars, etc?
I will be “riding the rails” in late October, and hoping to see good autumn colors, etc if not too late. I would prefer not to make reservations, and make decisions based on weather etc.