Ole Olsen/Reno family immigration

Ole Reno immigrated to Minneapolis in 1871. I believe him to have been Ole Olsen, who appears in the 1865 Vaagans census as a baker. On the same census page is Karen Hasselberg, daughter of Jens Hasselberg, who is the owner or administrator of the Hopen Gard. Ole Olsen and Karen Hasselberg married May 16, 1870. They had a daughter Margrethe in March 1871. Karen and Margrethe (Olson) are on the passenger list of the steamship St. Olaf arriving New York in September, 1871. Family settled in Minneapolis MN. Ole became Ole O. Reno, Karen became Carrie M. Reno, daughter was Maggie in early years, went back to name Margrethe Jensine in adult years. The Renos had another daughter, Olga Caroline in Minneapolis, MN in 1880. I cannot find any record of emigration or immigration for Ole Olsen/Reno. Citizenship application says he came to US on or about Feb. 3, 1871. Still trying to figure out if this is indeed the correct family who became Reno in this country. Ole Olsen is listed in 1865 census and in marriage record as coming from Selbu. There is a Renaa farm name there. He signs citizenship application Ole Renaa. Any suggestions for finding Ole on an emigration or immigration list? Also want to find birth record for Margrethe. Also would like to understand the farm families dynamics better. Would it be unusual for a Hasselberg daughter to marry one of the farm workers? Would they move away to his home farm, so that perhaps Margrethe would not be born in Vaagan? Thanks for any help that's out there. Joy