Low tech => good
Things like instructables and lists of needed items could be outputs (seen this?).
On data about refugees, there is also OpenMigration. If someone from your side wants a way in, my friend and onetime collaborator Antonella Napolitano helps run it. They are quite disillusioned with hackathons – this post might help you design your own: http://openmigration.org/en/op-ed/hackathon-and-refugees-we-can-do-better/