The isolated fort Taronkivish had a census last year. 122 dwarfs - grown out of an end-of-first year population of seventeen, including two immigrated children. Seven of the current denizens are single dwarfs who embarked or immigrated, six are the heads of the Three Families. Between them, these three couples have 70 children in the fort, and 24 grandchildren. There's also _one_ other clan, a couple with their thirteen children.
The evident heads of the families are the matriarchs - the mayor (starting seven's carpenter/woodcutter, with all-around legendary social skills), the chief medical dwarf (weaver/clothier, immigrated as hunter) and the militia commander (engraver/mason). The fourth family is led by a furnace operator, and i'm seriously considering making metalworking a family tradition for the clan. This quite generally seems like an interesting idea for a long-term fort - assign the main occupations to families, so that a child of farmers would become a farmer, too (with some variety - the child of a thresher shouldn't be limited to threshing when there's a shortage of, say, brewers or cooks). The 'crafts' might be best divided into two families, one for the craftsdwarf's workshop occupations, and another for the clothing industry.
And my first attempt at a minecart route was a qualified success. The minecart made its way down ~120 z-levels with a single push. Downside was it lost the five lumps of clay that were supposed to be the payload and i disabled the route again for now.