On the mainland opposite Mozambique Island, a two-minute walk from the bridge (to your right, coming from the island), Casuarina has a well-maintained campground on a small, clean beach, plus simple bungalow-style rooms and ablution blocks with bucket showers. The seemingly basic restaurant is lauded by those in the know, especially for its pizza (made in a real oven).
Casuarina Camping
Northern Mozambique