The Caribbean is going to be humid so I have a few suggestions.
You could find out if there is a great hairdresser on site to blow dry your hair to perfection with anti humidity products to stop it frizzing. Buy some great hair accessories and a beautiful veil.
Slick it back making it look really clean and sharp
Buy a beautiful hat that is fabulous ...More >
For future hair advice I would say the straighteners need to go and you need to be shown how to bring out the best in your natural hair. Leave in conditioner is fantastic.
Find a great stylist that can give you a free consultation. There is no need to suffer.