It has been a common strategy since prehistoric times, usually involving moving cattle or sheep upland to better grazing in the warmer months. It was still practiced in the Carpathians in Romania when I first went in 1998, with huts of wood or stone well up on the hillsides, with no roads leading to them, only paths. I don't know if this is still done. There is also seasonal migration to harvest crops.
But I had never heard about it in relationship to fishing until Sponge-headed Scienceman described the fishermen in Newfoundland when he was doing graduate work there in the 70s. The government had paid people to move into town from the impoverished remote areas because it seemed easier than trying to get electricity and services to those parts. The sum they offered looked princely because it was cash money, but as people could not easily get jobs in town it ran out quickly. However, they still knew the good fishing spots near their old villages up and down the coast, and many had left furniture and heavier tools behind in their abandoned homes. So every year a number of them would go out to live - quite unofficially - in their old houses and resumed their former industries of fishing, crabbing, and lobstering.