~450 square feet, with how many feet in the third dimension? You probably had an order of magnitude more volume than 330 cubic feet there.
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"?
Not in a storm you can't! Granted I didn't do ten days. But I was with two other people for close to a week and it was...fine. We're old friends. There were moments it got annoying. But it was never boring or restrictive. We just played games, drank, looked out of the portholes, cursed hangovers and talked the one person who occasionally wanted to call it.