Teardrops, too
Will, in all fairness, the term teardrop is also a legitimate term. While, this is only surmise, I think teardrop refers to the smaller trailers, more of which were home built. But you were on the right track and I know little, just happened to have a book on the old trailers and it is such a delight to look at the history - lots of pics.
I assume you, like me, have found this thread a prod to do a little googling. What fun.