Your plan sounds reasonable. We had the same situation. Here are some questions you need to answer:
- Is your svn repository complying to the standard layout for branches/tags/trunk? If not, you might restructure your svn repository prior to converting to git.
- How much history do you need in the git repository. I suggest you run svn clone from a recent revision (e.g.
git svn clone -r 1234
) and set the svn repository to read-only.