I have ancestors that immigrated to Detroit from Bohemia in 1854 -this was probably the earliest of the immigrants. Birth place listed as Bohemia, in 1900 census, Austria, and language German. Their names were: Anton Zinader (Cinader/Cinider/Cinadr/Schneider/Snyder -all changes seen in censuses/records as decades wore on) and Agnes Cusna; they married in Detroit in 1854 and Anton was a tailor in 1860 and 1870, by 1875 they were farming in Greenfield Township, Wayne County and in the 1870 and 1880 censuses, near them are many other families originating from Bohemia; some of the names were Holland/Hulen, Nemecheck (&variations including Nimenjack), Proshaska, Benda, Votrabeck, Addison, Paluska, Brichta, Yelnick, Zygmunt - many of the names in the 1880 census in Wayne had some unusual spellings. Cinaders and Nemeceks actually became related some years later through marriages.
Anton Cinader, Agnes and family stayed in the Detroit area;they died in 1901 and 1902. They apparently belonged to a society of Bohemian immigrants called the Slovanska Lipa Society; the society owned a large plot of land in Woodmere Cemetery, on Fort Street in Detroit; that is where these two family members are buried; I have visited (last summer) and was amazed: many graves with Czech inscriptions on stones, etc. Zlatica of this forum helped translate some of the info I had taken down; might want to consider this angle in your search for Bohemians in the Detroit area; unfortunately I haven't been able to locate (Yet) more information on the Slovanska Lipa Society although I am sure it must exist in someone's archives; good luck.