Quite a few ranches/farms around here in the Central Valley in Ca had migrant camps.… neighbor still has an old dilapidated one that they never tore down..... kind of like an apartment complex or a motel.... long narrow building with small apartments.... I think most had a bath house or common shower type building...... the workers came in for a few weeks at a time, picked the crops, planted, or whatever and then moved on..... somewhere in there they never left.