This might sound like a silly question, but it is far from that. The luggage allowances on light aircraft flight transfers to your African safari camps and lodges are pretty tight. And imagine you are traveling for 2 or even three weeks and you got 15 kg for all, inclusive hand luggage. Then the laundry service at the camps and lodes becomes essential.
The laundry service is usually very good. They collect your laundry in the morning and aim to have it back in your room the same evening. A delay can only occur when the weather is wet and it takes longer to dry, but usually they are really quick to serve also the guests that are staying only for 2 nights. Also the quality is good. You get back your t-shirts and shorts nice and clean and ironed. After your safari you wish to have the service at home.