Becky -
sorry for the short response earlier - I was @ work and couldn't elaborate
Anyway, I didn't have mid fossa, I had retrosigmoid, but here are my responses to your questions (you'll find that we are all unique here, so you'll get lots of different answers).
Usually the surgeon just shaves as much hair as necessary - you won't have a completely bald head, like my children feared I would
Usually patients have enough hair left to cover the incision area and what is shaved tends to grow back very fast. My hair was growing back before my stitches were even removed - which was about 9 days post op.
I had a very tight mastoid bandage wrapped around my head for the first 48 hours or so; most patients do.
The length of surgery generally depends on the approach, the location and size of the AN, and how "sticky" it is. ANs are basically removed layer by layer (peeled, actually) - and that's after the docs actually get to it - so things take time. My AN was 2.5+ cms and my surgery took 7 1/2 hours.
Honestly, I felt pretty bad the first 24 hours. I woke up with the room spinning and I had double vision. I wasn't doped up at all - didn't really require pain meds - but the anesthesia wipes you out. Everyone has a different experience, but usually the first couple of days are the toughest. Everything is generally downhill from there.
The game plan is usually to get you up and walking a few days post op. I failed to do this because I had massive nausea and just putting my legs over the side of the bed wasn't pretty. As a result, I spent too much time in bed and was in the hospital for an extra day. Moral of that story - start walking as soon as you feel up to it; it will help in your recovery.
Hospital stay is generally 4 - 7 days. I was in the hospital for 6, but my nausea and lack of eating were both big factors. Some get out of the hospital in record time - some take a little longer. It's important to remember that it's not a race - listen to your body and to your doctors.
My neurotologist had me doing vestibular exercises pre op and I continued them post op, so my balance adjusted pretty well without physical therapy. But it was offered to me if I wanted it.
I'd check with your docs about the medication you are currently taking.
My hospital had no restrictions on nail polish - fingers or toes.
Good luck,
Jan