I have found a couple of different night trains from Rome to Interlaken for July 21st. There are two trains leaving at 8:40 pm and arrive in Interlaken at 8:03 and 8:35 am.
I was wondering if I should make a reservation for one of these two trains now? Or can I wait and make a reservation when I get to Barcelona next week. Does anyone have an idea on the cost of this reservation and the extra costs for a night train? (I have a Eurail global pass)
Thanks