"so how many gnomes live here?"
Ask GreyOne. Smaller than any of the two main strongholds. A few thousand maybe, since its essentially a large wharf.
"What do they all do? Any other races?"
Build airships/prototypes. (Think large wharfs, most ships in the world are built in a few places)
"If so how many?"
Dunno a lot, though I do think they build ships elsewhere as well. This is simply the BIGGEST wharf.
"Where do they get their materials? Food? Supplies?"
From the strongholds. The entire economical structure of the region is based on food being transported to the mountain strongholds (LP and LoB) who maintain standing armies and FLEETS which prevent the fiends from passing into the Kessel. Thats why you need the Gnomish Brotherhood in the first place to maintain the airfleets for warfare and logistics.
"Any people of importance? Guilds? Great houses?"
The Gnomish Brotherhood (think the pilot guild in DUNE)
"What kind of government do they use? What patrons do they worship? What patrons recognize them? What's their relations with the other patrons?"
Some sort of GUILD structure I guess. Ask Grey One.
As artificers LoB ("god" of Artifice"), the Pale Lord as anyone else in the World, the Mistress of Sea (domain:Air). And possibly others for the same reasons anyone else would worship a patron. (Would not openly worship Shaylay in the highlands though)...
"Are they aloof or open about their works? What secrets does this place hold?"
No, they control the market like MICROSOFT. They´ve got a monopoly on the manufacture of Halas (the material used to levitate the vessels). The patrons have no need to try and devise new ways to build new vessels as the GB do it fine enough.
As long as they concentrate on profit and trade and do not meddle in affairs with fiends they are allowed to maintain their monopoly.
Quite secretive. Ask GreyOne.
"anyone got a rough draft on this place?"
Ask Grey One.
Hope that helps, if not: Ask GreyOne...
