Hi there, I'm planning to buy a Saver Day Pass from SBB for a single day of my trip that I'm planning to spend in Lauterbrunnen and the immediate surrounding area (my base is in one of the cities so I need a longish train journey to and from Lauterbrunnen anyway). Crucially, I won't have a Half Fare Travelcard with me, as it just doesn't make financial sense to buy one for one single day of use.
Anyway, I'm trying to work out exactly how much the Saver Day Pass covers in the Lauterbrunnen area: obviously the big trains are covered, but what about the PostBuses? Or the railway between Mürren and Grütschalp? I've been looking at the SBB website trying to figure it out but it's not the most user-friendly. (It tells me "Whether on SBB trains or trains of other rail companies, on boats, buses, trams or postbuses, the Saver Day Pass opens up a wide range of routes for you", which is delightfully ambiguous.)
Any info as to what exactly the Saver Day Pass covers, especially in the Lauterbrunnen area, would be greatly appreciated. Thanks in advance!