Can't help with the buffet, but we just got back from HHI, and we enjoyed a restaurant that is fairly new there. It was recommended by a man who lives on HH that I sat next to on the plane. It's called BoneFish Grill and was excellent. We always enjoy Captain's Seafood restaurant also. It's much more casual, but I love their fried oysters. Redfish was another good seafood choice for us.