Search for Pauline Norum/Setternes

When attempting to trace the movements of my Grandfathers Sister's between Norway and the US in 1895. Using all the sources I have access to have resulted in a blankwall. I have been unable to establish her initial travel route to the US, her residence, place and date of marriage after1895. On 22 August, 1895 Pauline Norum, 19yrs and Single departs Aalesund Norway on a Prepaid Cunard Line ticket. Her Arrival Date and Location in the US is not known and neither is her Final Destination in the US. I next pick up her location back in Norway, where Pauline Norum, now Pauline Setternes, 24yrs and married is again departing Aalesund with twins, Nils and Martin Setternes in the company of her younger brother Peder Nornen (Peter Norum), arriving at ELLIS ISLAND, the Port of NY on 23 june, 1901, with a destination of Bryant Hamlin County, South Dakota. This is also the initial destination of another of Paulines brothers - my Grandfather Martin George Norum, who traveled one year earlier in 1900. Can anyone suggest possible search plan and/or sources to obtain this information?? Regards Gene H. Norum