Just give them a name of "DRAFT - xxxxxxxxx". In this case, since you don't know where they're going, maybe "DRAFT BIT1", "DRAFT BIT2". Then, when you're ready to have them reviewed, just rename them and remove the "DRAFT".
This is also good advice for any cache you are working on, but don't want reviewed, yet. Someday, maybe we'll be able to have an option for drafts to not be submitted for review, but for now, this will work.