WordNet sense 1 ((of groups of people) tending to travel and change settlements frequently):

mobile, nomadic, peregrine, roving, mobile

WordNet sense 2 (having no fixed course):

erratic, planetary

WordNet sense 3 (not settled or established):

unsettled

WordNet sense 4 (of a path e.g.):

rambling, winding, meandering

WordNet sense 5 (travelling about without any clear destination):

vagabondage