Thanks for that information. No the tour does not include a canal tour so that is something we might do. Right now I think I will skip the black forest but will do Heidelberg. The included excursion though Uniworld sounds like just a walking tour. This is the description of the tour
STRASBOURG PANORAMIC TOUR WITH CATHEDRAL AND OLD TOWN WALK
Controlled over the centuries by either France or Germany, Strasbourg is both cross-cultural and bilingual. Old and new, French and German all blend together in this wonderful city, which is also considered the legislative and democratic capital of the European Union. Get a glimpse of Strasbourg's grand political role as we drive by the European Parliament and the Council of Europe, where the European Court of Human Rights sits. Then get a feel for the cultural side of the city on a walking tour through its enchanting streets.