Hi Margus!
Yes, you can camp where there are no houses, like in the forest.
You can camp at the same spot for (I believe it is) two days - if the nature when you leave the place is like it was before you came, then it is OK.
Do not make a bonfire in nature; it's forbidden and we hope you are not starting a fire in the woods.
Please do not put toiletpapers under a stone, please put it in a bag and bring all litter to a dustbin at a petrol station.
If I get you right I believe you want to ride from sout to north, you like narrow gravel roads, high mountains and deep fjords.
Some roads is closed for you - net legal as we have animals we do not want to frightend.
But some roads is legal and fun, but I'm not an expert on that subject.
Try theese guys:
http://www.allroad-mc.com/ I'm sorry it's in Norwegian...
''Medlemmer'' = members - pick one and send an e-mail. Anders Dihle at the members list live not far from me, and I know he speaks English.
And sometimes I meet Odd V. Larsen at Tyrigrava, riding a dirty bike.
I hope that helped!
And I hope to meet you when you are coming, but not too deep in the forest as my Scarver and I prefèr hard surface.
I live near by Oslo.
Cheers!
Liv.