Independently backpacking Europe from July 13 to July 7 with two other friends. Most likely starting out in London, with money, and a Eurail pass. T
Then from London-Paris via chunnel, then using Eurail, move from Paris to Brussels, Brussels to Antwerp, then into the Netherlands, obviously Amsterdam. Then train to northern germany, Bremen, Hamburg, Berlin.
When we stop in places, we plan to use Hostels or tents that we carry, and in transit we use the sleeping cars as mobile hotels, to sleep in.
From Berlin, we want to move to Poznan in Poland, from Poznan to Warsaw, and we arent sure to take the upward route to Gdansk, and then move through Scandinavia, or the Southern route, which will bring use through Czech Republic, Austria, and through switzerland, and back to France.

I need suggestions for equipment, and ideas from people who've done it. Suggestions?