I don't know what to do at a hackathon

This year's Wikimania starts tomorrow! It's a huge conference for anything related to Wikipedia, Wiktionary and any of the other Wikimedia projects.

I'll be attending the hackathon tomorrow and on Thursday, but I don't really know what that entails. Will I be able to work on the Wiktionary https://gitlab.com/Skalman/translation-editor/? Perhaps I'll be inspired by what everyone else is doing, and want to help them out? I'm not really sure how to prepare, or whether preparing is even a good idea.

I do look forward to the hackathon, even though it scares me a little.