So I'm planning on doing something a little more interesting with my next fortress: Essentially, for the first year I will build a fortress and everyone will be fine and it will be a completely normal fortress, but after the first year ends and spring comes again, every immigrant who shows up will be sent to an alternative fortress, with its own food, its own sleeping areas and everything. The first-year-dwarves will have no interaction with the immigrants, and the immigrants will be living entirely underground in pretty awful conditions; a shared barracks to sleep, nothing but plump helmets for food and beverage (they may also supply the first-year-dwarves with their farming stuff and basic furniture if I'm feeling exceptionally fancy), and of course they would also be the primary/only source of soldiers, who would be poorly trained and armed with whatever equipment I can manage to scrape up between making the next round of masterwork steel goblets upstairs.
The key part here is that no doubt there will be plenty of tantrums and bad news happening down there, but I don't want my dwarven bourgeois seeing or feeling any of that. How hard do you think it would be to keep them entirely separate, NOTHING leaking from one to the other?