For your trip to Nainital make sure to pack lightweight and comfortable clothes in breathable fabrics like cotton or linen, comfortable walking shoes, and a light jacket or sweater for the evenings. Include sunglasses, sunscreen, a hat or cap, an umbrella or raincoat, personal medication, a basic first aid kit, a camera, a portable charger, and insect repellants in your packing. Lightweight clothing, in breathable fabrics like cotton and linen to stay comfortable during warm days.