Thank you all for the quick replies!

We will think about crashing in the airport, but great idea about the couchsurfing website. I didn't know it. I will have a look, and maybe something will come up!

We will only be away for the weekend, so we don't carry anything other than handluggage. And if we check in the day before, we don't have to be at the airport 2 hours before the flight.

Thanks a lot!