Hi. i went to the arctic circle back in late may/early june. rode from stavanger to the circle via lysebotn, voss, alesund, trondheim, bronnesund on road 17. then to the circle. roads were pretty rough for my 600 fazer, but it coped. mileage was about 200 miles a day, with one of 350 when i rode back down from the circle to trondheim, and that took 10 hours. even the E6 was quite rough, and on the way up ferries and photo taking took up a lot of time. i had amazing weather, hot and sunny for almost every day.
Geiranger was good taking the ferry on a 40 minute trip down the fjord. Trollstigen road is spectacular and a decent campsite at Andalsnes. from lyseboten to Vos some of the E9 and E143 were boring, nothing to see but trees, the best roads were minor roads just south of trondheim such as the 65 and 660 between orkanger and andalsnes , or 57 just south of forde. not much traffic and great scenery. not fast roads, but no heavy traffic.
most campsite were about 100 kroner a night, and good quality. plenty of them to choose from
had a great time and will go back, but need to save up lol!! its expensive, but worth the trip. very friendly people and plenty of them speak good english.