Yes and no...
Some people have worked around their BootCamp to go off of a drive other than a start-up disk. Note, this is NOT supported and there have been issues with it, but there has also been success. If you are deeply technical, you might want to look into it.
If you just want BootCamp. Get Acronis Back-up (the trial will do) and image your Windows from inside your VM. Now, get your BootCamp set-up and 'Restore' the Windows to your BootCamp partition. Now BootCamp should have you data.
Just make sure you get those BootCamp drivers installed after the restore, and you un-install parallels tools prior to the back-up.
Now, point your Parallels at your BootCamp partition, boot and install Parallels tools.
It should all work now.