Another common method, especially in dry terrain. Passenger capacity restricted to two due to limited humps. Particularly ideal if you want to get from Gaza to Yemen. You simply join one of the Nabatean camel caravans returning empty to Yemen for another load of spices. According to Pliny “the elder” every 34 km there is a cistern that only the Nabateans know where they are located, so always be nice to them.