Any idea where one could get proper information regarding boat and/or other reserved tickets for the above festival?
Unfortunately I am not conversant in German.
The festival website is all in German, but you can use the google translate function to read. There are still boats with available spots, although pricey, most include food and at least one drink.
http://www.koelner-lichter.de/koelner-lichter-beste-sicht-schiffe.php
Thank you Sam but not even Google Translate will do the trick in such a way that one can buy a ticket knowing what exactly you are paying for.What a pity.