Given the analysis, I think I'm going to pull everything for posterity, do a full backup and I'll try the load with importDump.php, which is the most standard method available. If/when my wiki gets bigger I'll install pywikibots, but for now they seem like another potential vulnerability.
I'll then move the repository and pdf directories over by hand, and put some access control on them, and use [https://www.mediawiki.org/wiki/Manual:ImportImages.php ImportImages.php ] to get the images into the wiki.
==Dumping Data==