newcruiser2 - You should be OK as long as the BC is certified. You might want to take a copy of your marriage license along as well. What did RC say when you called them?
As for San Juan, if you are docked in Old San Juan (which I think you are) you can walk right off the ship to San Cristobal and El Morro. Old San Juan is a wonderful area to explore. If you like to walk, you will love this port. Enjoy! (Sorry, can't help you with St. Maarten)