On the RootsWeb page, click Family Trees in the strip at the top. On the next page, click Advanced Search. There are two HOTTMANN lines from Glueckstal listed.
David HOTTMANN (26 Mar. 1857, Glueckstal (Colony), Russia - 10 Sep. 1928, Eureka, SD) wf. Katerine, b. Sep. 1859, had ch. b. Russia: David, Je. 1882, & Katherine, Feb. 1886; & b. Dakota: Johan, Mar. 1891.
David was of David, b. 1831; Jonathan, b. 1795; & Johann.
Google "1930 census." That will show you other censuses, too. It looks as if David, b. 23 June 1882, had a large family in McPherson Co., 1930.
The Germans from Russia Heritage Society in Bismarck has many records.