One bag travel
Jonas Hieatala in A work week one bag travel:
I’ve been spending five nights away 4–5 times a year on business travels. It’s not a crazy amount but also not negligible, so I figured it’s worth trying to optimize them a bit.
Like Jonas, I travel occasionally for work. (Coincidentally, a few of my travels are in Sweden, too!) Although I've travelled for two nights at most, switching to "one bag travel" took a bit of adjusting.
However, nowadays I wouldn't entertain the idea of checking in luggage or carrying anything else than my backpack kit when I go on these trips. It's a much more convenient way of travelling. This walkthrough from Jonas covers the aspects you have to think about when travelling this way.
My best tip is merino wool t-shirts, sweaters and socks. No problems reusing these items multiple days without washing, which saves quite a bit of space.