yeah but you still have to worry about radiation coming down on your shelter, I've heard it described like ash in the air or sooty snowflakes. So long as you don't have too much around your shelter you would be pretty safe from initial blast radiation after 2 weeks to go out and brush anything off the roof.
What I'm wondering though, is about what to do with your outdoor clothes in this type of situation. Obviously you can't bring them into your shelter, but you also don't want them just sitting out exposed to the elements, and if you need to wear special clothes you don't want to be stripping outside and exposing yourself to beta-burns. I was thinking maybe a decontamination shower at the entrance, or maybe an entrance, with like lead drawers to put work stuff.
In this type of situation, what happens to farming and livestock? And water supplies?