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Can I spend the night alone in a tent in a forest outside Stockholm in -20 degrees Celsius without risking my life?


The backstory:

From the end of January, I'm starting my studies in a suburb of Stockholm. I've decided to, if it turns out plausible, not rent an apartment, but live in a tent. (This is not out of frugality, but out of a will to try something new.)

I do have friends who I could visit once a week or so to prepare food and wash my clothes, so I think I can solve the practical problems, or at least those that I've come to think of. I'd camp in one of the forests, maybe 1 km from "civilisation". I'd have access to showers etc at university every day.

However: I don't want to freeze to death in my sleep! That's very important to me. I've read that the nights can get as cold as -20 degrees Celsius. With the proper preparations, would this be a plausible way of living, at least for a month or so?

I do have camping experience, and have been hiking for three weeks, but only in summer.

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Think of every time you've gotten out of bed at night to urinate. Now imagine every time doing that either going in a bottle that you keep in your sleeping bag, or facing the cold and running outside for a few minutes. That is by far the worst aspect of winter camping, in my opinion. –  whatsisname Dec 15 '12 at 20:14
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@whatsisname - this is easier when you're a guy who uses a tarp instead of a tent. I just kneel at the downhill end of the tarp, and it saves a some hassle. –  Don Branson Dec 16 '12 at 3:15
    
@Mia - one thing on the plus side of what you're doing is that you're only 1km from safety. If it got really bad, you could pack up, walk out, and wake your friends sleeping in their warm beds. Still, -20 is really, really cold. –  Don Branson Dec 16 '12 at 3:16
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Are you planning to live on a campsite, or in the wild? The Swedish allemansrätten means you can camp anywhere, but you cannot stay indefinately. I think you need to ask permission to stay more than 48 hours, and I doubt the town will give permission for your use case. But if you're on a campsite, it's of course permitted. Then you could also wash your clothes there. And, -20°C is nothing indeed! My colleague tried this (just for fun) for maybe three nights here in Kiruna with temperatures down to -40°C. Oh, and he decided not to bring his tent to his present work in Antarctica. –  gerrit Dec 16 '12 at 21:51
    
@gerrit I was planning to pack the tent up every day so that I can camp in different places, e.g. 2 days here, 2 days there, 2 days in another place, and then back again. I suppose that's within the scope of Allemansrätten? –  Mia Dec 19 '12 at 9:11

7 Answers 7

up vote 19 down vote accepted

Yes, it is definitely doable. -20°C is only -4°F. The real question is whether it is doable by you at the level of discomfort and hassle you are willing to put up with. Only you can answer that. At best we can point out what the hassles and discomforts will be.

First, your fear of dying of cold in your sleep is silly. You'd have to do something pretty stupid to die of hypothermia, and even that's not going to happen when you're inside the sleeping bag. The main danger will be from frostbite, but that again would largely need stupidity to help it along, although that's easier to do than outright death from hypothermia.

Your tent will be a long term fixed installation you set up once at a time and conditions of your choosing. You can therefore afford a larger and heavier tent with more stuff you bring in once. Definitely get a tent you can stand upright in. That will make changing clothes much quicker and more comfortable. Since you should be able to keep water out of the tent, get a nice down sleeping bag and a few light blankets. The down bag should be rated for most nights, then put the blankets on top for the few unusually cold nights. Since again weight is not really a issue, get a full sleeping bag, not a mummy bag. They are simply more comfortable. Get a good insulating pad, and another two as backup. Get a tent large enough to fit your sleeping bag and something to sit on next to it, like a folding chair. Put something under the legs to spread out the weight to that they don't hurt the tent floor. Get one of those rubber-backed mats people sometimes put just inside their doors and put it just inside your tent. That allows a place to step with boots still on, then you can sit down on the chair with boots still on the mat to take them off. The crud stays on the mat, which you can shake clean by reaching outside after having put on your down hut booties.

Some things are going to be a hassle. At -4°F you want to keep your gloves on whenever possible, but some tasks will be difficult that way. You end up taking your gloves on and off a lot, trading off efficiency with cold fingers. Get a pair of polypro glove liners. They are thin and still allow many tasks to be done, but provide at least a little insulation. Their main advantage is that any metal you touch won't immediately conduct the heet from your hand away. Touching bare metal at -4°F is a good way to get frostbite.

Be prepared for some discomfort no matter what equipment you have. The toughest part will be getting yourself out of the sleeping bag in the morning. You'll really have to will yourself to leave the warm comfort of the bag and get into the air at probably the coldest part of the day. At some point you'll have to change your clothes and get undressed in the process. That's going to be cold. It won't be cold long enough to be any real danger, so it's really a mindset issue to get over. Whether you can or not and are willing to push yourself in that way only you can say.

You say you have access to heated buildings during the day, so it would make things a lot simpler for you if you don't have to deal with cooking and eating at your camp. Perparing food outside in the cold takes a lot longer than in a heated kitchen, severly limits what you can do, and may also risk predator encounters depending on what is around your area in the winter.

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I cannot answer directly if you are risking your life or not, however, it is quite possible to tent in -20C weather, given appropriate preparations and gear. Condensation, possible wind and snow-load are a few of the environmental factors to consider in your preparations and gear selection. The condensation one is critical, as damp gear (in general) loses significant heat retention value.

Presuming you are close enough to the city that wild animals are not a problem, you might still want to check the local area for what kind of animals are about in the winter.

Given that you have no winter camping experience, I would strongly suggest you try it out for a day or two first, perhaps somewhere closer to home, before you go. Winter camping is significantly different in some ways than summer. Cooking will take significantly longer. Even heating water can take a long time and burn quite a bit of whatever fuel you plan to use. You will unavoidably have to remove heavy gloves to do certain tasks, and your hands will invariably get quite cold. The rest of you can be more-or-less well insulated - but you'll have to have quit a few layers and changes of clothing to be comfortable/dry.

I would further suggest some kind of check-in system, that someone knows where you are to be every morning, and comes looking if you don't show up to class. If for whatever reason you are caught out, the sooner someone starts looking, the better off you'll be.

Remember too, any electronics or similar kit may not work at those temperatures, and if they do, the battery life may well be significantly worse.

So by all means, prepare well and then try something new, but perhaps with a few days of a test run first.

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Get a Lavvu with a stove!

Lavvu in Jukkasjärvi

Photo from Wikimedia Commons

The Sami population of Lapland have lived for centuries in Lavvus in a climate with temperatures down to -40°C. They did decide about a hundred years ago or so to live in houses, because it is a tad more comfortable. As the Sami still exist, this proves that it's not immediately lethal to live at such temperatures. They did have a very high infant mortality, but I suppose you're not planning to give birth in the tent. A rather important point though: in a lavvu you can have a fire:

Lavvu with fire

photo from the Norwegian UFO centre

See also this discussion.

However, keep in mind that allemansrätten does not apply!. The Swedish right of everybody applies for short-term stays, usually 1–2 days. If you are planning to stay weeks or even months, you will need permission from the land owner, or stay on a proper campsite and negotiate a good price. The latter also has the example that you have a nearby emergency escape if things go bad (near a city there can be other dangers than cold).

P.S. If you do get a lavvu, can I come and visit you this winter?

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Even the temperatures around 0 C are real threat to life!

For -20 C you'll definitely need very good equipment. A sleeping bag with comfort temperatures around -20 C will cost much but without it you won't cope. But you must note, that 'sleeping' in tents in such low temperatures is often not real sleep, but overnighting.

If it matters if you sleep alone or with someone else - yes, definitely! Each person in tent warms up the air, it is much much warmer with 4 people than with 2, and sleeping single is a challenge. Also, if you get ill, 1 km in deep snow is much more exhausting than you could imagine.

My answer: you are risking your life. In team the risk can be really low, but I wouldn't risk such expedition alone if I were you, if you're not a survivalist.

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If only I could +1 this 10 times! –  Steed Dec 19 '12 at 10:45

-20 celsius is not particularly cold, but 3 weeks summer hiking experience is not particularly helpful. You might not kill yourself, but you probably won't thank yourself, either.

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Re: tent size and down sleeping bags

  1. the bigger the tent is the more energy it takes to warm it up. You want a balance between space (to move around in) and energy here, so probably not something you can stand up in.
  2. your sleeping bag should be fairly close fitting (i.e. not a rectangular bag). Same reasoning here as in #1.
  3. be careful how much stuff you put on top of a down sleeping bag as this will compress the down and make it less effective. One exception is a bivy or waterproof liner outside of the bag (for rain/snow/etc). Bag liners that go inside the bag can add 5-10 degrees F.
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The tent size issue for heating makes no sense. The 30 W or so your body puts out raises the temperature in even a small tent a insignificant amount. See the recent discussion of a candle raising the temperature, and that was assumed to put out 100 W. –  Olin Lathrop Dec 28 '12 at 14:27
    
Olin - interesting point, but I don't think it's correct. I'll take some thermometers with me next time I go out this winter and report back; it definitely FEELS like my body heat changes the air temperature inside the tent a significant amount. –  Aaron Jan 30 '13 at 9:08

I know the base question is about survival but, based on your back story, one of my biggest concerns would be security.

During the day when you are away you will need to take everything you value with you or risk it being stolen. Even if you take everything with you thieves will not know that and may rifle through your belongings looking for something of value. During the night being alone will make has it's own vulnerabilities.

You mention moving every couple of days. Moving this frequently will probably place you in neighborhoods that you are not familiar with and presents a number of risks.

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I was actually planning to pull the (small) tent down every morning and set it up again every evening, so that I don't leave anything out of sight. My plan was basically to sleep, read and perhaps eat in the tent, and spend the rest of my time somewhere else with my backpack. –  Mia Dec 19 '12 at 17:25
    
I would still have concerns about security but that might just be me. Best of luck to you. I don't think I could live that frugally. –  Brad Patton Dec 19 '12 at 17:32

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