What is a good workflow for working with SCCS as a version control system?
Do not put up with this. SCCS was cr*p when it was actually used back in the 1980s, and the idea of using it in 2010 is ridiculous. I'm speaking as someone who worked for a company training people to use the thing, back then, so I know whereof I speak. Any modern VCS will be far, far, far better, and as most of them are free, there is no possible reason for using SCCS.