I've spent quite a lot for my first Rally Sweden, but now going for the 5th time sure it is worth it. Some good jacket, pants and especially shoes are important. Most difficult is to keep warm on shakedown, as you're standing still for a very long time. A good tip can be to put some plastic (or tree branches) under your feet, to keep the snow away from your shoes. If it's really icy like 2 years ago, it can be handy to get some "spikes" for your shoes. They cost nearly nothing and you can buy them at most petrol stations. For those who forget something or have issues with shoes or anything else, it could be interesting to know there's some sports/outdoors store in Torsby not so far from service, at the ICA Supermarket (roundabout where E16 meets E45). We've needed it once for a friend who's shoes weren't waterproof enough.

But ok, I've never had really cold temperatures in Sweden, sure there are some guys with a lot of experience on this forum to tell more about it...