Verge of a breakthrough!

I'm on the verge.. Looking for Käri Olson (nee Gigstad), born Valders, Norway 20-Apr-1864. Came to America abt 1890, changed name to Clara. Married Gustav Olson (A Swede) abt 1900 Died 20-Nov-1934, Malmo, Aitkin Co, MN On the 1865 census I find Kari Knudsdatter, Age 2, on the Dokken farm (I believe is a subfarm of Gigstad) in Nord Aurdal, Oppland. I found Kari Knudsen leaving Oslo, Norway on 03-May-1889 on the Angelo Line heading for Manitowoc (Wisconsin). Okay...what is the next step? How do I find her arrival in America? Also, the family legend is that Käri and Gust met on the boat to America. Also...I have been told that the name Käri is not the same as Kari (without the umlauts) Thanks in advance for any help. Bob