A secondary (fire) exit is required by safety standards, but it doesn't actually have to be in the bedroom. And it just has to be big enough for a human to get out, so any window that is large enough will do (should have an EXIT sign on it, though).
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC