I'll agree with the other two posters- it really, absolutely doesn't matter, except between you and your spouse. Before our first time, I was really concerned about what/ how much to wear to breakfast. It turned out to be a complete non-issue; absolutely no one cares one way or the other, and the whole range is represented.

Nights are similar, even with the themes. Don't get your expectations up too high about nighttime. Maybe things have changed recently, but at least last year, the crowd was usually small, and less than half participated in the theme. Most men were dressed, but not all. Some dressed nicely, some dressed up, some dressed down.

Have fun! Hidden Beach is a really first-class resort, with some of the best staff anywhere.