This unfenced swampland reserve of about 350km2 was created shortly before independence and consists largely of marshland, veined by a network of reed-lined channels. It includes two large islands: Nkasa and Lupala. Together with Mudumu National Park, it has the vast majority of Namibia's population of sitatunga, red lechwe and puku.
Mamili is located in the southwest corner of the eastern Caprivi Strip, where the Kwando sharply changes direction to become the Linyanti. As yet there are no facilities for visitors and few passable roads, even with a 4WD. The NWR issues camping permits, so check with them for the latest information and buy one before you leave Windhoek or Katima Mulilo.
Approaching along the D3511, the turn off to Mamili National Park is at Sangwali village. This community, together with the nearby villages of Samudono and Nongozi, are in the process of setting up a conservancy in their area just outside the park, and plan to develop a simple campsite there. There is already a small craft stall, Sheshe Crafts, about 4km from the D3511 as you head into Mamili. This sells locally produced baskets, carvings, reed mats and some very authentic fishing traps.
If you really want to see Mamili, and don't have a small expedition, then the easiest way is probably to stay on the other side of the river, in one of several exclusive camps in Botswana. Selinda, Linyanti, DumaTau and King's Pool are all in this area, overlooking the park from Botswana.