For stand alone teepees, start with three long straight poles and use a tripod lashing to join them. Try to locate a long pole with a Y-shaped joint at one end. This will provide the frame with stability as the next pole can rest within the Y-shape. To build the teepee, continually add pairs of similar sized poles and join them together at the top, leaving the base wide enough to curl up in and tall enough to sit comfortably.
A company called Intershelter sells igloo-shape pleasure domes that call to mind Luke Skywalker’s old pad on Tatooine, but cost only $12,000 for one big enough to include a kitchen; it can be thrown together in a few hours, to make an instant hunting or fishing lodge. But in the worst of times, this dome, “built to sustain hurricane strength winds or earthquakes,” makes great relief housing for disaster victims and, in theory, would make great bug-out bunkers for urbanites looking to build a survivalist compound on the fly.
Rising S Bunkers offers the best underground steel shelters, bomb shelters, safe rooms & blast doors on the market. We lead the industry in quality and we have the highest standards for craftsmanship in underground bunkers and other emergency shelters. The Rising S standard of quality is unmatched by any other bunker company on the market today.  Additionally, every project is completely customizable.  Many customizations are available at no additional cost.

Should law and order on the streets break down after, say, a massive hurricane or nuclear-reactor meltdown, that condom slingshot might come in handy in New York, where possession of the most fundamental survivalist self-defense staple — the gun — is highly restricted by law. (The same goes for brass knuckles, nunchucks, ninja stars, switchblade knives, wrist-brace slingshots and, that D.I.Y. prepper favorite, a paint ball pistol loaded with ghost-chili-powder balls.)

Preperably a real snow cave, a quinzhee or a slope cave would be chosen, but those shelters are time consuming and requires some experience to do right, and in som areas like in the forest, it can be impossible due to snow depth, or to find a bank with enough drifted snow. Shelters like that are more useful above the tree-line were there are more snow and less vegitation.