Sadly, I don't know much of my family's drama because I'm a generation too young and my father was always wonderfully incurious about it (there's plenty, but nobody left alive to tell the tale). The main fund of stories on my wife's side is absolutely chock-full of weirdness, but he's 88 and regularly shushed by his wife and daughter whenever he "gets going." I think he's probably got a good 4-volume biography in him (present at assassination of Alexander Karađorđević, POW in Germany, partisan in Italy, occasional anthropological film-maker and inveterate gambler), but getting to the material is all but impossible.

It sounds like you have the ideal novelist's distance+information, and airing everyone's dirty laundry in public is a great way to stir up further craziness. Have you considered a regular series?