Bedouin, e.g. (5)
(Other definitions for nomad that I've seen before include "One travels from place to place with no permanent home" , "Person wandering" , "Unsettled type" , "Traveller with no permanent home" , "Roving person" .)
(Other definitions for roamer that I've seen before include "One who travels aimlessly over a wide area" , "Wanderer" , "Unsettled person" , "Aimless traveller" .)