Be warned they don't even always go to the station even when booked to! The first time I did the branch (which admittedly was some time in the late 1980s or early 1990s), on the return the unit was booked to stop at the station but actually reversed at the junction. On my second trip, I was determined to get the rest of the track in, so forced the unit to go up to the platform by waiting there, in view of the driver, for the unit to come up to the station to pick me up! (For info, it's a 15 min or so downhill walk from Liskeard to Coombe Junction.)