When I got married seven years ago, it was at an all-inclusive resort in Puerto Vallarta. We thought that because it was a Hard Rock resort that the chances of children there would be very limited, but we were wrong.
Not that there's anything wrong with children being at an all-inclusive resort, it just killed the vibe as we were trying to enjoy some adult time together.
That's no longer going to be a concern if you plan on vacationing in the Florida Keys.