I have an Interrail pass for me and my two kids.
I will first travel alone from Bergen to Riga, later to Sandefjord to pick up my children.
Is there a way to book seats only for one person for the first leg of the journey, and then add the others to the trip later on?
You can book reservations for any number of persons you like. Reservations are separate from the pass and can be done wherever you like. For Norway, it's best to do them via Entur.
The advice from the experienced travellers in the community is to use other ways to make reservations than the Interrail/Eurail website. You can look at the guide in the link:
https://community.eurail.com/train-connections-reservations-47/how-to-get-reservations-105
If you, after having looked at the guide, have questions about how to make specific reservations, please create a new topic with your travel details (departure date, time and route) and you will get advice.
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