Status update: a review of the Trac index (95 pages worth) yielded 5 pages worth of trac docs which should be transferred to Confluence. The majority of those documents are related to policies, guidelines, how-to's. About 3 pages worth of such info remains to be transferred. Many of these documents need to be updated for the current developer environment and workflow. Some of that is happening as the document is transferred.
IMHO, the critical files have already been transferred: the Language and Documentation Guides, the SW licensing info, key policies, and pointers to the old TCT meetings.
The full index has been re-categorized to group subject matter together. On completion of the 5 pages of policies, etc, the individuals responsible for the other 90 pages worth of data will be notified so that they can move critical files over to Confluence or risk the danger of bit-rot setting in over time.
I recommend that after this initial transfer is complete, the trac documents become read-only and the Trac logging mechanism start log every access to trac documents (instead of only those that fail). That way, an audit 6 months later can determine what files are additional candidate for xfer to Confluence.