02-05-2007 - 02:42
The sleepers, both couchettes and sleeping car, can be reserved in the train station wherever you are on your trip. I believe that some routes are pretty popular, so booking as far in advance as possible is adviseable.
I've interrailed twice in the summer and found no problem with booking; even on the day of travel. Last year I bought a couchette place, on the train from Bordeaux to Lyon, from the conductor (Monsieur controlleur). Cost: 17 Euros.
I'm also taking a 22 day trip in July - taking in places in Holland, Switzerland, Germany, Poland, Czech Rep, Italy and Provence.