I am traveling through Switzerland and Italy in a few weeks and am wondering if all reservations can be made at just any train station in Europe? I will be leaving from Lauterbrunnen early one morning to head to Venice, and from Brig onward is a Cisalpino train (which later turns to ES) that will require a reservation. Will I be able to buy this reservation at the small Lauterbrunnen station, or will I have to get it at the larger station at Interlaken Ost when I switch trains? Do I reserve just for that leg of the journey (the only leg where reservations are mandatory) or for the entire Interlaken-Spiez-Brig-Venice?
Also, I know that the train from Interlaken to Lauterbrunnen is part or the Jungfraujoch and not covered by my railpass. Will I have to buy this ticket when I get to Interlaken (which would require that I allow a little extra time between trains), or can tickets for private railways be purchased elsewhere, such as my earlier stop at St. Gallen?
Thanks! I know I'm obsessing over details that could probably be found out when I get there- I just like to know what to expect well in advance! (I'm not a roll-with-the-punches type of girl- but I'm trying!)