From what I've been reading up to a degree, you want to be in a windowless, low-airflow situation for a day or two so the nuclear particles in the air can settl

From what I've been reading up to a degree, you want to be in a windowless, low-airflow situation for a day or two so the nuclear particles in the air can settle down. It's not radiation free at that point, but you're mostly dealing with radioactive dust settled on the ground. So walking carefully, wearing a mask or cloth over your nose and trying to keep outside dust outside and not take it inside is a decent thing. And from there the priorities would be water, food and clearing roads, as controversial as that sounds to "keep the dust down". I live in a city, and my best chance at survival once basics are met is to ensure supplies and emergency vehicles can move. If those don't exist anymore, it's questionable chances anyway, so it's better to ignore that.