the rooms vary from cold AF to boiling hot, try to wear layers you can shed or pile on as needed.
It gets extremely crowded in the halls between devrooms. Allow 2x as much time as you think you’ll need to get from A to B. More if you’re going from building to building.
FOSDEM Flu is no joke, even before COVID: consider masking for the event.
IIRC the food trucks don’t take credit, so have cash on hand.
It’s been a long time since I’ve gone. Hope it’s a great experience for you.