The team, curators working for the fest from out of Paris of even out of France will need a place to stay during the OSF as the volunteers, set up and dismantle can be included. For that you have different possibilities: whether booking a flat, call the community...
It's important to start asking the volunteers, if they can host the others volunteers coming from around the world, if they are from Paris and have place.
Then you can send an email to the Parisian community (through mailchimp)
It's also useful to communicate about it through social media (OuiShare facebook groups)
And start listing the needs and the offers through a spreadsheet to manage the whole process