We will depart the Ruby Princess in 2014 in Le Havre rather than returning to London where the cruise terminates. We will proceed on our own to Paris where we will spend four days before flying back to the USA. There is conflicting information as to how to pass through French customs and immigration. Can we do this in Le Havre and is there a visa required? Princess said all that we need is our passports, but other threads on the web contradicts that. Any help would be appreciated.