The Mammoth Camp was just starting during the events of The Mammoth Hunters. Vincavec and his sister Avarie were both members of the Amber Camp. Normaly a man only starts a new camp after he gained a spouse. Vincavec started his own hearth and a new camp while he was still bachelor. The is a Mamut (shaman) of the Mammoth Hearth, so he dubbed his camp "Mammoth Camp". Some (like Tulie) saw this as a pomposity.
With the help of the Lion Camp the camp build a large house near the Dnieper River using a large amount of Mammoth bones.