I have a 30 day "Swiss Half Fare card" and intend to also buy "Swiss Saver Day passes" for these two scenic routes. Swiss Saver Day passes are CHF 39 with the Swiss Half Fare card right now (though prices will go up as passes sell off). For some long trips, including these two, this makes using a Swiss Saver Day pass cheaper than buying tickets with just using the Swiss Half Fare card.
Could someone please tell me if I have the the following process right? Here is what I plan to do...
• As soon as I can (possible to purchase 6 months ahead of time): Buy Swiss Saver Day passes for the two dates of travel from SBB for the Glacier Express and Gotthard Express;
• 93 days before each journey (when purchasing seats becomes possible): Purchase "seat reservations only" on the Glacier Express and Gotthard Express at their websites;
• 2 months ahead (when tickets on these trains are available): Ignore this date. There is no need to buy tickets because the "seat reservation" and "Swiss Saver Day pass" and "Swiss Half Fare card" serve that purpose;
• On the travel day: Turn up with my seat reservation, Swiss Half Fare card, and Swiss Saver Day pass, and simply board the train.