I try to run a fortress with just seven dwarves inside which never go outside. Literally they are sealed inside.
The question is how to deal with migrants. I want every migrant wave to clear mess after the previous wave, sort corpses and spare belongings to stockpiles and die quickly (so they don't spam with complaints).
Surprisingly it turned out to be a hard task for, at least for a newbie. Don't forget, that seven dwarves must be able to build killing conveyor during first spring and summer, before first waves appears on the map.
Bonus question is how to solve a problem of ghosts. I had to devote a whole full-time dwarf (remember, I have only seven!) to make coffins. Is there better way? Special problem arise when next wave can't bury corpses because of a siege. I tried slabs, but their interface is sooo inconvenient when you have to place memorials for 20 migrants in a row.