When I save a Rhino-drawing in .dwg format and open it in autocad or a viewer, the drawing is opened in modelspace.
Some of my customers complain about this. Before sending the dwg, I have to open it in acad, switch to paperspace, zoom out and then save it. If a customer now opens the drawing it starts in paperspace.
you could have your exported rhino file consistently generically named (Plan_01.dwg example) that is referenced into a file that is all set up in Paperspace. Send both files. Or script it to always bind/insert said xref, then send 1 file.