I have to wonder if mediawiki.org is the right place to host this page. As far as I know, mediawiki.org is meant to be about documentaion of MediaWiki. There is an entire project for outreach and collaboration initiatives.
Topic on Talk:Wiki Techstorm 2018
Hackathons are usually documented here. See listing at Hackathons/Previous hackathons.
This wiki hosts much of the content that the participants need to do their programming work, plus some attendees make it their hackathon-task to create or update the docs here.
You might also compare it to an editathon, which are usually documented on the wiki they're focused on, e.g subpages of w:en:Category:Wikipedia meetups in 2018.
Outreachwiki has more abstract uses.
Hope that helps :)