Maybe some insignificant tiny island out in the Pacific? Assuming the world enters nuclear winter I suppose you wouldn't have to worry about rising sea levels anymore.
Chile also seem a nice place to hide in. I saw a video of exactly this topic in Youtube and they showed the wind patterns. There is a consistent stream of cool air from Antarctica that would blow away fallout. If all else fails, you can go and hide up the Andes.
Unless you live somewhere or farm, your home will not be a good option. You should avoid cities (big or small) at all costs! After a nuclear attack chaos will be the new law and you need a safe place to protect yourself from radiation and people!
The ideal would be a bunker inside a mountain surrounded by sentry guns, but since no one around here is a billionaire or heir to some villain of 007, we have to keep our chances. Therefore, I believe that our best option is to use a simple tent, resistant and easy to mount / dismantle, because depending on the conditions we will have to move fast. But a simple tent is not able to provide the protection we need! Then, after mounting, cover the tent with aluminum foil (at least 30 layers with the brighter side facing the outside). Finally, grease the outside of the tent with extra virgin olive oil. Ready! These steps aim to ensure good thermal insulation, camouflage and a Mediterranean touch with olive oil.
That s it....
LOLed at "Mediterranean touch". I live along the Pacific rim, can I just use something else?