It's a beautiful place to fly, with uncrowded skies and lots of small airfields around to drop into. The people are great and English is widely spoken, often better than wot it is 'ere!
You don't say where in Norway you'll be, but wherever it is you'll have some memorable flying assuming the weather co-operates.
It is normal practice to file flight plans even for internal flights if you're away from populated areas, which means most of the time!
There's some useful stuff on the Norwegian
Good Aviation Practice web site.
The Norwegian Aero Club have a shop in the centre of Oslo opposite the big SAS Radisson hotel.
I flew myself there and back in May and I can't wait to go back.