Chas, I've sent you directions which lead you roughly the same way. Trouble with your directions is, you're not allowed to turn right at the top of Hafenstrasse or Fabrikstrasse.

Turn left from the ferry terminal, drive along Kaistrasse for roughly 200 m, turn right at the lights into Stresemannplatz, drive straight on along Ziegelteich. From there, your directions are ok.

However, I'd think it more sensible to collect at my place as the rooms I've reserved are round the corner from there. So it is:
up Ziegelteich as above, then turn left at the next major lights, towards the motorway.
Another mile or so, and turn right at the lights just before you actually enter the motorway.
Turn left at the next lights, drive straight on across TWO level crossings.
After the second, turn left at the lights, which will take you to a bridge across the motorway.
Turn right into the next street. The huge block of flats at the bottom is Kolonnenweg no 1. Ring bell at Kalweit. If no one opens, please wait. I may be out collecting more Mudcatters.

BTW, I learned last night we'll have to find something else to do on Friday night: Dick Gaughan has cancelled his German tour at short notice, for reasons as yet unknown. Very disappointing, of course, but I'm sure Mudcatters will rise above that. Looking forward to you all!