Just make sure that you backup your home folder, apps, Library (the System one, too!) etc. Then you can clean install the Release version later on and just copy your stuff over it. Yep it's kind of a hack, but it's also the most simple backup solution for running (release) systems. And it just works fine most of the time. In the worst case, you'd have to copy the stuff one by one to find out what the release version _doesn't_ like. Usually, it just works.