I honestly would consider if taking straighteners in worth it in the first place. I have very curly hair and even the best straighteners in the world couldn't keep it straight in the Caribbean humidity. After 14 holidays and many wasted hours trying I gave in to the curls and wear it up so its away from my face because that makes it more frizzy. I also found that scrunching with wax helped stopped the frizz and protected it from drying out too much in the sun.
Some days the humidity was so high my hair seemed damp all day and there's no way normally curly hair is going to stay straight if its damp.
I've had it braided a couple of times and that makes it really easy but very curly when you get back home.
I'm sorry if this isn't what you want to hear but believe me it won't really matter once you're on that beautiful beach sipping cocktails with your new husband.
Have a great honeymoon.