My husband and I are looking to go somewhere warm, inexpensive, and low-key for our 10 year wedding anniversary this December. We need a short flight (coming from Washington DC) since we can only spend 3-4 nights on an island. We don't want to spend 8 hours on a plane! We are looking for an eco-friendly, cottage-on-the-beach kind of place and don't even know where to begin. Any island, hotel, or beach recommendations? Somewhere easy and quick to get to!