As a fairly new museum employee, I guess my experience corroborates your guess, Deb. I started off with an internship at the Smithsonian's National Museum of American History while still an undergrad in history, about 6 years ago. Upon earning my BA, I entered a museum studies program and got an entry-level job doing research for a new museum. Thanks to having that job, I got a related job as a curatorial assistant for the firm that was designing the museum. After a brief stint in membership at another museum, I returned to the original museum, participated in the construction and installation, and now have gotten a promotion to assistant curator. In other words, I pretty much settled on a museum job from the first, and have so far been lucky enough to land jobs I like. I do give a lot of credit to the Smithsonian internship as a door-opener.