Hi,
I am planning to go down the Danube river from Ulm to Costanta on an
inflatable kajak this Summer.

Since I have sailed only on lakes before, I would like to get some
advice from anyone who has some more experience.
In particular, I would like to get some more information on the
"typical" dangers I could come across on the Danube, such as traffic,
ships, strong current or... beaurocracy.

Thanks