I did lockdown in a ~450 sq. ft. Habitable under 400. Partner. Cat. Me. The astronauts will be fine.
I’m 6’, so that’s the usable volume. (I’m not claustrophobic heighwise.)
I honestly don’t see an issue spending a couple days with folks I respect and admire in close quarters for ten days.
Have you ever been on a boat?
What is a "boat"?