I've stayed north and south numerous times, and would have to say north is my preference. Athens Gate is nice but the area in general isn't as pretty (still beautiful, just not as much) as north. Our last few stays have been at La Perla del Caribe (
http://laperladelcaribe.com/) and it is beautiful. There are some large Villas that would be comfortable for your party or you could get two 2 bedroom Villas which are STUNNING and about 50 feet from the water. Several good restaurants within walking distance, bikes and kayaks included. NO, I'm not an owner there but I am a fan.