Sounds like you have a few good questions lined up. Getting a job on a unit that is a good fit for you is vital. A few other questions I found helpful:
-Is it common for the nurses to float to different units?
-If I don't feel that I'm getting the most I should be from my preceptor, or we don't make a good fit, what steps would I take and what would be done to improve the situation?
-How flexible is the orientation schedule? If, at the end of my orientation, I feel I am not quite ready to work independently, can be be extended?
-How often will I be meeting with my manager and/or educator to discuss how my orientation is going?
-What opportunities will I have for continued learning at this facility? i.e. certifications, seminars, tuition reimbursement
I would also suggest talking to the nurses working the units that you are interested in. I was lucky enough to do my clinical rotations at a variety of hospitals and units. As I was beginning to think of where I might want to work I spoke with many of the nurses, asking straight out if they would recommend working on the unit, how long they have been there, etc. I learned a LOT that way and it was very easy to see which facilities had the most sincerely satisfied employees. Of course that should not determine your decision, but I found it was a factor...and quite a reliable one at that! I absolutely love my job! Good luck to you.