LREP (Logical REPlication) is a tool to enable you to do precisely this, using perhaps removable media. It lives as a tool in the NOW toolchest - http://now.netapp.com/NOW/download/tools/lrep/
As another option (expanding on Chris' suggestion), in the past we have used a "small FAS" to "look like" the secondary system locally, populate, then drive to the real secondary site, VSM to the real secondary, then adjust naming so the primary continues to the real secondary.....
cheers
Mike