Hello Mackensey
Coverage to Kandersteg and Lauterbrunnen:
The Swiss Travel Pass offers free train travel from Lucerne to Lauterbrunnen.
Kandersteg is generally covered by the Swiss Travel Pass, but specific confirmation is recommended. Check the validity map here.
Reservations:
Reservations are not included in the Swiss Travel Pass and need to be made separately, often with additional costs.
Ticket Purchase:
With the Swiss Travel Pass, you do not need individual tickets within the coverage area. The pass itself acts as your ticket.
For specific excursions like Jungfraujoch, you get discounts but not full coverage (e.g., 25% discount).
I wish you an unforgettable time in Switzerland.
Greetings
RaheW