We plan to travel to Switzerland in May 2022 and will be going to Zurich, Luzern, Interlaken, Grindelwald, Lauterbrunnen and possibly also ride the Glacier Express. We plan to ride the gondolas/cable car going up to Jungfraujoch, Mt. Titlis and the Cabrio cable car from Luzern. I want to know if we should purchase both the Swiss Travel Pass for 3 or 6 days and also the Half Fare Card to avail the discount when we ride the Glacier Express. I want to plan accordingly and buy the correct travel cards that fit our travel plans within Switzerland.