Tell your bridal party about the destination before you ask them to stand by your side so that they can gracefully decline if finances are tight.
Don't forget to consider the climate when choosing your wedding dress. You'll be swimming in sweat if you pair your fairy-tale satin ball gown with tropical humidity. Whether your dream location is specifically a beach or simply outdoors, dress for no stress.
Don't keep a constant eye on the time. Remember that many tropical islands run on "island time" -- things happen when they happen -- and keep an open mind. Minor mishaps can sometimes make for the best memories.