Hi Steve
I are was 2003 on the way of Oslo to the North Cape.
1) the best cards you only need card 2-5th card 1 of Kümmerling+Freyr (Cappelen Kart) Road Map 1:400000 if you want to go from Oslo over Bergen
Have we calculatedly
2) with approx. 80 km. We had a little more than 25 kg of baggage at that time. Arrive also on the weather.
3)The best time is June end of August of end. One can before and after this have snow.
4) We are gone to Trontheim and from there from Oslo at along the coast to Mo I Rana and from there on
the E 6 there aren't any excellent alternatives.
We are driven for 4 weeks (2400 km) at that time and had 2 days quiet. Rod for the return journey with and I have needed $ days for the train the nimble. But consider the wintertime starts at the train connections as of 2008.08.17, you then can take your wheel along only with a train the train against 12:00 as train oil commercial possibility is cancelled for your wheel there, then.
Baye and luck has
Uwe