I'm not sure that the time isn't coming that Dick's origin will have to be retconned. The circus is pretty much dead in the current world--especially the small traveling circus. The upcoming generations will not be exposed to the concept at all, and it will date the character (and all the characters around him). I would wonder if a Cirque du Soleil type of organization might be a reasonable substitute. It has touring troups as well as permanently located ones; just its regular shows in the Las Vegas mega-hotels play to thousands of people every night.