Planners who wrote local laws restricting trailers and mobile homes to designated “parks” didn’t anticipate they would be used as retail businesses in the downtown core, according to Dave Nanney, a former City of Haines administrator who helped launch the planning commission and served several terms on it over the course of two decades, including as chair.

Housing was tight when the timber industry was booming here in the 1970s, and house trailers popped up…