"Free / wild camping" is allowed in Norway, with certain conditions. So, wild camping accepted, but driving in the wild is not accepted. Rules for camping are generally made for hiking, but you can drive as long as there is a road, however small, as long as there is no gate or poster saying otherwise. Some small, private roads have a small fee to help the land owner with maintenance, and some of them are miles and miles long, into the wilderness.
You can not camp close to houses, generally 150 meters. Land owners can not refuse camping in their outlying areas, unless there are very special reasons.
One important restriction for wild camping is that you can stay maximum two nights before moving on. Exemptions for camping on a hike in remote areas, when you can stay longer if not in the way for any man or beast.
You can park along roads, as long as it doesn't violate traffic regulations .
Generally, in populated areas, it is difficult to find good spots. The further north you get, the easier it is, except maybe the Lofoten area. If you stay off the E6 as much as poss, it will be somewhat easier to find good spots. My old father drives every summer from the far north of Finnmark, down to Bergen and Oslo in his camper van. He will generally use about 10 days one way when he could have done it in three, but he avoids major roads and finds marvellous spots to stop.
Nick nailed it pretty good in post 5 above here, re North Cape, and camping. Although I must say that with a ground tent you will find endless nice spots if you just pack everything on you back and go walking for a half hour or three.
And, North Cape is
not the northern tip of the European mainland. It is on an island, and not even the northernmost tip of that island, so it's a bit of a cheat. But, it is the most magnificent spot up there at the top of the map, and it has a gate where you have to pay, and a restaurant.
As said, the distances are great, but if you do go that far north, you will find a landscape not seen many other places. Also the inland, i.e. south towards Finland from North Cape, is spectacular. The weather can through anything at you, four seasons in one day, so be prepared. Generally we don't expect snow from June to September, but temps from 5 to 15 C, and occasionally op to 30 C inland. Wonderful after 40 + in southern Europe.
Edit:
Added the limitation of max two nights in one place. (see above)
Would also like to add that driving outside public roads is illegal in Norway, and is often frowned upon and reported by the local population.
More info at visitnorway-dot-com:
The right to roam: joys and responsibilities - [Leaving Land Cruiser Club]
