You can, however, move a campaign from main to dev, then transmogrify to a different dev campaign. The only thing that won't work at all is moving assets from dev to main (which makes sense, since the resources from dev may not be compatible with main due to new features). What I'll often do if I want to play on dev server is create and build my campaign on main then port it to dev, that way I still have those assets on main once it catches up. It also gives me an option if dev is being unstable. Hope that helps!
