while this is not exactly easy nor perfectly convenient, it does work really well and doesn't use a ton of space. i just did the same workflow with my pocket camera. worked great.
http://dcinema.me/2015/01/cinemadng-premiere-offline-davinci-resolve-round-trip-workflow-mac/
i've also found that shooting proresHQ gets you 95% to 100% of what you have in RAW, so there's no harm in shooting that instead of RAW.