When a construction project the size of a 2 year long bridge build happens, a lot of trailer parks suddenly happened

With construction of the Mackinac Bridge imminent, many folks knew that there would be a housing shortage in the St. Ignace area. One quick solution was to make house trailers available. Just a few of the “landlords” who applied for licensing from the city in early 1954 were: R. Cheeseman - for 20 trailers at 404 Portage (by April 1954, there were 16 in place), Patrick Gallagher - for 7 on Church Street, Allen Lester-for 3 at 159 First Street.

https://www.saintignace.org/history-of-st-ignace/tidbits-of-history/