Campsite facilities are overall very good facilities through Southern Africa with basic facilities in East Africa. It's all part of the adventure and it adds to the flavour of the trip. Remote campsites such as; Serengeti National Park, Ngorongoro Crater and Masai Mara can be more primitive and do not always have hot water. Less remote campsites and accommodations have hot and cold running water, swimming pool, small shop and a bar.
A handy tip: always have pocket tissues + baby wipes + hand sanitizer with you.