Staying hydrated is crucial when camping in the cold, especially when you're exerting energy to set up camp and explore the icy terrain. Warm beverages like tea or hot chocolate can help keep you warm from the inside out, while also providing hydration. Additionally, water-rich foods like soups, stews, and fruits like watermelon and oranges can help replenish your body's water levels. Avoid alcohol and caffeine, as they can dehydrate you and make it harder for your body to regulate temperature.