You can bring a mountain of luggage to Norway. You will enjoy the country more if you do not.
The layer system
Base, mid, shell. Swap pieces instead of packing four personalities. Winter needs seriousness; summer still needs a waterproof.
Cabin vs hold
Regional aircraft have opinions about overhead bins. If the airline app warns about bridging bags, believe it.
One romantic item
Keep space for something pointless that makes the trip yours — a paperback, a tiny speaker, ridiculous socks — then cut two “just in case” tops.
Pair with Flying domestically in Norway.