Couple of other places you might want to post this question.

First, the Fodors/Europe forum <http://www.fodors.com/forums> -- lot of knowledgeable travelers there with expertise on France in particular.

Second, the Cruise Critic board <http://boards.cruisecritic.com/>-- they have separate sections for each cruise line, and also for innumerable Ports of Call. A very helpful community as a whole.

HTH