Pack a strong backpack for multi-day treks, and a durable duffel bag for safaris since hard suitcases are unsuitable for transporting in safari jeeps. If neither are in your plans, obtain a sturdy suitcase that meets your needs in terms of size. If your bag does not come with padlock protection, buy a lock separately as luggage theft can be a problem in Tanzania.
Carry a small handbag to store necessary travel documents and money. A money belt is also recommended for traveling anywhere in Africa. Unless you have checked your belongings into a reputable hotel, you will have to keep this safely on your person while traveling in Tanzania.
Pack light loose cotton clothes, sunglasses, sunscreen, a swimming suit and a good hat. If you will be climbing Mt. Kilimanjaro or Meru, pack thermal underwear, a warm sweater and jacket, thick socks and durable hiking boots.
Seal your toiletries within a small sausage bag to be stored either in your suitcase or handbag, depending on which items you wish to be easily accessible.
Pack your camera gear in a protective case deep within your suitcase. For photographing wildlife in Tanzania, a 300mm telephoto lens is recommended.