Well, you live in trailers. Horse drawn. Watch that cool movie Freaks. It is a kind of a cult film about circus life-- probably in the 30's to 40's. I am not sure what time it is set in. I've seen things on Vaudaville life in the period you mention, not much on circus. Look at Toluse Latrec drawings they have circus people of that era. Also Piccaso. He painted circus people.