Welcome to Cruisemates, tnj470! As long as you and your wife are US citizen's you'll be fine.
You should also take a picture ID (driver's license) into port.
As Donna said, don't take anything off the ship that you won't need. We usually take about $30.00 in cash and one credit card. We also bring a copy of our passports, just in case. It won't get you back into the US, but it will speed up the process, if necessary.