We have only cruise the Caribbean and the only except to having to show both Govt ID and ship card has been at Costa Maya, Mexico. Every other port we have been asked for both. It is no problem carrying our driver license with our ship card. We don't bother with passport as we always know what time to be back on board and are on early. The times we have taken excursions not with the ship they have always been in the morning and for no more than 4 hours.
Star Princess 2005, Sun Princess 2005
Caribbean Princess 2006, MSC Lirica 2006 , NCL Pearl 2007, Majesty of the Seas 2008, Carnival Destiny 2008, MSC Lirica 2009, Carnival Valor 2009,Carnival Legend 2010, Carnival Liberty 2010,Carnival Fantsay 2011,Carnival Valor Feb 2012, MSC Poesia Dec 2012, MSC Poesia April 2013, Carnival Legend Nov 2013, MSC DIVINA Jan 2014