This sounds like a fantastic idea, even though getting over to Sweden would be a near impossibility for myself. However, I can offer up the entire North of Canada to folks that would like to venture in this direction.
From reading this thread I have noticed a trend of the concept of a Moot/Meet becoming a full-on winter trek. In my experience of leading winter trips here in Canada, one must be very careful when making this transition. For people with minimal cold weather experience, a basecamp with cold-camping can work. Once the idea moves towards moving camp, hauling pulks, learning to use skiis or even snowshoes, the exhaustion, frustration and danger levels climb very quickly. As a family we frequently take 4-6 day snowshoe treks in the winter with nighttime lows that meet the magic -40 mark. With foreplanning, comfort with the environment on our part, our 3 y.o. can hardly wait for winter to arrive. At these temperatures, the cold in-experienced often overheat when moving and become shivering damp bundles of misery in the evening. Simple mistakes are magnified immensely in the deep cold of a northern winter.