Kari Nilsdaughter, emigrated from Oslo in 1881

My great-greatmother's illegitimate daughter, Kari Nilsdaughter, was born in Slidre, Valdres in 1859. I find her in the census of 1865, and I also find her confirmation in the main church of Slidre in 1874. Then everything closes down on her. I have not been able to find her death, and I have not been able to find her as married or in the census of 1900. What I have found, however, is a Kari Nilsdaughter from Valdres who emigrated in 1881. Destination: La Crosse. I don't know which La Crosse, but her close family settled in Lanesboro, Harmony, Mn - which is not very far away. The Kari I have found in 1881, left by the ship "Angelo" on May 6, 1881. Her age has been set to 20 years - if it is "my" Kari, she must have been 22, but I suppose 20 was an ok cipher. I hope somebody can help me in finding her. Thank you. Anne Brit Benum Oslo Norway