What would be the ideal itinerary for visiting Sequoia National Park in California if I have 3 days or 5 days to explore? Could you suggest a detailed plan for each duration, including must-see attractions, hiking trails, scenic viewpoints, and other activities that should be prioritized? I would appreciate recommendations for a balanced mix of relaxation and outdoor adventure, taking into consideration the park’s main highlights, dining options, and the best ways to get around during my visit.