Hi there,
I'll recommend you to watch this link for some info about Oslo:
http://www.visitoslo.com/en/ and you can see if you find anything interesting
I'm not sure about places to stay, but you can contact the local furs (for instance Tellos, Skarpen, Burr or Dax), maybe they can give you the info you need
Norwegian furs like hanging with other furs, so probably someone would be interested, but I'm not sure if I have time for it.
Do you have a specific date yet?
Hope the helped you a bit :3
And an apology for my poor English
-Wolftale