Not necessarily... you can travel to Puerto Rico with a License or Real ID License, if you don’t have one of those then you’ll need a passport.
There will be transportation from La Concha Resort starting at 2:30pm until 3:30pm to the Cathedral (Wedding Ceremony) and from the Cathedral to the Casino (Wedding Reception). There won’t be Transportation from the Casino back to the hotel.
It is... however, not for the Luis Muñoz Marín Airport (SJU), due to an agreement with the Taxi Company.
18 years old.
The colors are purple and gold!