If you want to have sea view and easy access to Ya Long Bay, you better book those along the beach like Hilton, RC. Otherwise, you have to walk quite a distance to get to Ya Long Bay. For family-friendly hotel, I suggest Marriott. They also offer free shuttle bus to and from airport.
All things bright and beautiful. All things great and small.
All things wise and wonderful. The Lord God made them all. Cecil Frances Alexander 1818-1895