For all professional pilots there exists a kind of guild, without charter and without by-laws. it demands no requirements for inclusion save an understanding of the wind, the compass, the rudder, and fair fellowship.
There are two instances I studied in which a community moved, amazingly, into an preexisting village built by other, earlier communalists. The Rappites were a German millenarian sect I mostly leave out of the story, even though they are fascinating, because they're focused on salvation and retreating from the world, as opposed to transforming it, like the other groups I write about.