This sounds like such a fun weekend. I'm jealous! Here's what I would take:
Since you do such great WTWs (and I loved your packing for Paris post, too), I have a question for you. I am going to spend a long weekend in Portland, Oregon at the end of February. Saturday night will be a fairly casual wedding at a McMenamins, for which I have an adorable b&w wrap dress and a bright blue cardigan for contrast. I need to know what to pack for the rest of the trip - tootling around Portland with the hipster kids in the rain on Friday and Saturday a.m. and a nice post-wedding brunch on Sunday morning.
Puffer Vest - I love this vest from Target! I have it in red.
Jeans - From J.Crew in a nice dark wash.
Turtleneck - With a little extra flair at the wrists from Design History on super sale at Bluefly.
Rain Boots - Odds are that it will be raining when you are there. Nothing is warmer than a dry pair of boots! They're not very packable, but so well matched to this weekend.
Tote Bag - For shopping in eco style.
Sweater - On sale from J.Crew.
Shirt - For warmth.
Skirt - A bit of pattern from Banana Republic.
Ballet Flats - Comfy and cute for your big adventure. I had a pair of Jeffrey Campbell's in grey that I wore until they completely fell apart.
Clutch - Packable and fun!
Incidentally, I think this is what I would take with me to Norway. Portland and Norway, apparently the same in my mind. Have a great time in the Northwest!