Not sure if this is old news, but just a heads up that the lock (de kock van leeuwensluis) into Gouda is closed for repairs for many weeks to come. If you enter on the Nieuwe Gouwe from west to east as we did, there is a small marina (WVGouda) with a super friendly havenmeister. However it’s a narrow dead end canal. Would not recommend anything longer than 16 m.