Hi Courtney! I saw your welcome on my newbie post. So, as you know, I just got back from checking out a bunch of places in southern Florida. I can tell you how they rated, IMO, in terms of ceremony location. I also took tons of pics that I'd be happy to share!
Here are some of the resorts we visited that had the best beach ceremony locations (IMO!) -
1. Mariner's Club, Key Largo (I think they're changing the name, can't remember...)
2. Key Largo Grande Resort
3. South Seas Resort, Captiva Island
4. Tranquility Bay, Marathon FL (technically on Key Vaca, I think)
All of those places sound like they would be good for the intimate ceremony you're wanting. We visited 5 other resorts that I can fill you in on as well, if you'd like!
Hope that gives you somewhere to start!