AutoCAD Civil 3D :: Corridors / Sections & Slope Staking Reports

It’s been drilled into me that we should keep Civil 3D Objects as separate as we can in the design process, thus minimizing data loss in case of corruption (or other some such disaster).  So, our current workflow for our transportation projects is as follows:

Receive LandXML files of points, surface and existing CL alignment from surveyor.

Create a separate dwg for points which is then xref attached into our base model
Create dwg for EG surface, create dref
Create base model (existing conditions)
Create Roadway dwg, import LandXML of existing CL
Create design CL, dref
Create design profile, dref
Create Corridor dwg
[code]...

We are now being asked to produce slope staking reports, which require a “live” corridor and a SLG.  Our current workflow doesn’t have both of these in the same drawing and since you can’t dref a corridor or a SLG, I'm forced to duplicate the SLG in the corridor dwg. Obviously copy/paste the SLG isn't an option either.  I tried that, then exploding them down to polylines and creating a new SLG from the polylines, select them all, yeah, random creation.

Is the intended workflow to have the design corridor, SLG and all the section views in one drawing?