I'd check the weather before packing snow shoes, you may be better off with crampons. The recent freeze thaw cycles and lack of snowfall means that the ground is covered in thick ice.
I spent some time in Oslo today at the headquaters of DNT (theNorwegian trecking association). They had heaps of advice about planning trips especially if using their mountain huts. They have free planning maps which show the distance between huts marked in km or hours walking time. Anybody fancy a trip in autumn?
Currently three hours north of Oslo at 700m asl. Some snow left on the higher trails but they are starting to look green in places.
Have a great trip.
I couldn't get on with lined craghoppers and longjohns together - the surfaces tended to pull at each other while moving and either wrapped the longjohns round my legs, or pulled them down my legs inside the trousers..
If it's not too cold then lined craghoppers on their own might work..
I've used unlined Fjallraven trousers over 200g merino at - 10 in Canada..
I've also worn American M1951 pattern wool trousers on their own down to -10
I did have a pair of Swedish M90 quilted overtrousers with me in case, but didn't need to use them
I have got the following:
Base:
arcteryx rho pant
Wool long john
Outer:
Lined Fjallraven Barents
codet 210 wool trousers
Shell:
TNF goretex light shell
Not all at once of course