@Scrbblechick -- Can you imagine trying to bustle some of these trumpet/mermaid gowns that have voluminous trains? Ridiculous.
I always thought the bustle must have been even more inconvenient than a hoopskirt. Hoops are big and unwieldy, but you can sit in them, with some practice. Bustles aren't quite as forgiving. That probably explains why young ladies were taught to sit at the very edge of chairs -- their bustles wouldn't get in the way.