Hi Pauligirl
My Norvegian skill are very limited but as much as I understood you are looking for some travel tips how to find your way to Valkeakoski/Tampere.
A first of all book your flights to Helsinki (Finnair, SAS, Ryanair).
From Helsinki Airport easiest way to Valkeakoski is to take a bus (www.expressbus.com). Journey takes about 1.5h and cost you about €20 one way). Valkeakoski busstation is located 0.5km from Tehtaanttä Stadium which located next to huge papermill.
If game will be moved to Tampere you can still use expressbus because Tampere busstation is terminal line for the bus. Ratina Stadium is located next to Tampere busstation, so even you cant missed it: )
If you need any more "tips" please let me know.