Actually I'm still a student, so ask me the other questions in a few months. As far as typical days at nav school, it varies greatly. Here's a rough breakdown of the type of days:
Academics:
The course is broken up into different phases (7 total). At the beginning of each phase you have academics. Days vary a lot during academics, sometimes you're in class 8-5, others you'll come in for a couple of hours of classes and go home.
Sims:
Sim missions are 4 hours long (time in the sim). You'll have 4 hours of mission planning the day prior where you spin up your flight plan and plot your charts and go over the departures and approaches. The next day (usually) you'll have a 4 hour sim with an hour brief and debrief.
Flights:
Flights are on a T-43 (modified 737) that has student stations in the back. The flights are 4 hour missions as well. You'll show up about 4 hours prior to takeoff to spin up your flight plan, check your pubs, brief with the instructors and pilots and step to the jet for your pre-flight checklists. After the flight you'll have about a 30 minute debrief with your instructor.
Whenever you have flights or sims, that's all you'll do for the day. There's no formal release like they have at UPT (thankfully!) where you have to stay at the squadron 12 hours a day regardless of what you're doing.
So that's a brief and rather rough rundown of nav school. Enough of me rambling. Let me know if you have any more questions.