Daniel,
First of all welcome to xmarks. I had the pleasure of visiting your fine country this past summer.So if you've heard of anyone in a kilt in Salzberg this summer it was me

The winters in Norway and Austria have a lot in common.I wear my 8 yard trad outside in the winter. It does help to keep moving. I do a fair amount of outdoor camping in the winter for that I use ordinary layered clothing. If needs be a snow scooter dress.No kilt

Off course this doesn't stop me. I often wear it to church in the winter and out shopping. It is very cosy and not a little bracing

For your other problem use the chop technic. Just be careful

All the best......David