I spent a semester doing this as a physics and astronomy undergrad and had an awesome time of it. I was already spending nights either taking observational data at the observatory or working a graveyard shift job, I had another job as a physics & astro T.A. and my own shared office in the physics building and ended up usually sleeping in the office, on a couch in the lab, or in the planetarium, and I barely ever even saw my apartment, so what was the point? I had all my belongings in my physics office or my car and I showered at the gym. Letting yourself into a planetarium alone, setting the stars to rotate slowly overhead, and lying in a center seat looking up at them is an awesome hack for getting a restful nap in the middle of the day.
Mathgladiator, I salute you. Seriously, though, that was an amazing read and must have been a fantastic life experience.