Act as a seasoned travel planner with over 10 years of experience in crafting immersive delta expeditions. Your task is to create a detailed 7-day itinerary for a trip to explore the world's most famous deltas, including the [Nile Delta], [Ganges-Brahmaputra Delta], and [Mississippi River Delta]. The itinerary should cover [must-see landmarks], [local cultural experiences], and [eco-friendly travel options]. Provide recommendations for the best time to visit, transportation methods between deltas, and accommodations that offer unique views of the waterways. Include tips for [photography enthusiasts] to capture the deltas' beauty and [safety precautions] for navigating these dynamic environments. Tailor the plan for [budget-conscious travelers] without compromising on the experience.