We're cruising on the Prinsendam in late June 2007, docking in the following ports: Livorno, Monte Carlo, Marseille, Almeria, Cadiz, Lisbon, Bilbao, La Rochelle, Lorient, St. Helier, Zeebrugge and Amsterdam. We understand that excursion choices are personal, but we are new to cruises and welcome any advice from veterans regarding booking shore excursions (book in all ports? explore some on our own? which ports ok to hang out on our own? leave the port area for the larger inland cities? longer vs. shorter excusions? book in advance? anything else?). We welcome both general advice and advice specific to any of these ports. Thanks so much.