A. I'm having trouble figuring out why a bride chose "formal resort wear" for a cold weather wedding - a wedding in the tropics, I understand. Bride's prerogative, I guess!
Resort clothes are typically vibrant, playful and cheerful; made of lightweight fabrics intended for a winter getaway to a warm climate. Formal resort wear is usually a little less dressy than typical black tie or formal wear. My guess is that the bride wants you to wear pretty dressy dresses that are fun, festive and bright. Pair yours with pretty metallic sandals and playful jewelry and you should be set.
Since it will be chilly out, wear your usual dressy coat and take it off as soon as you get inside. Have fun, and pretend you're on a tropical cruise somewhere!
Below are a few dresses suitable for a formal resort affair: