Act as a seasoned travel guide with 10+ years of experience in African and South American wildlife tourism. Craft a detailed 7-day itinerary for a small group (4-6 people) to explore the world's most famous savannas, including the Serengeti, Maasai Mara, and Pantanal. Include [BEST TIME TO VISIT], [MUST-SEE WILDLIFE], and [LOCAL CULTURAL EXPERIENCES]. Provide packing recommendations for [SEASON], estimated costs for [BUDGET LEVEL], and safety tips for [TRAVELER TYPE] (e.g., families, solo adventurers). Highlight unique accommodations like eco-lodges or luxury tented camps, and suggest responsible tourism practices to minimize environmental impact while maximizing authentic experiences.