Hello, Lane.
Thanks for posting your question about cloning your Active Site to your Staging Site. Unfortunately, BoldGrid does not include a function to duplicate the Active Site into the Staging Site. However, this can be accomplished manually, by installing the same Inspiration as your Active Site (but as a Staging Site) and then copying the contents of each page (from the Active Site) into the Staging Site. If you would like to see this feature available in future updates of BoldGrid, I recommend submitting your feedback here. Our BoldGrid Developers are always looking for ways to improve your experience!
Sincerely,
Carlos E