I would like to go from my hotel in Bern to my hotel in Grindelwald, but when we get to Interlaken, I would like to leave our luggage in the lockers, and take a train to and from Lauterbrunnen to explore for a few hours.
If I buy a point to point ticket from Bern to Grindelwald, are we able to leave the station at Interlaken and get back on the train later to Grindelwald?