I also had a CSF leak repaired 10 days post op, it was planned as an outpatient procedure, but had a terrible spinal headache and had to take an ambulance ride to the hospital. My surgery was about 6 hrs and they performed a mastoid obliteration, where they basically peeled my ear forward and went in through the mastoid bone to "patch" the leak. I was in the hospital for four days and until the headaches subsided, because I could not sit or stand at all, I was laid out!
This was a very scary time and the last place I wanted to be was the hospital AGAIN. At least this time I had a single room. I'm not sure what type of surgery your Doctor is planning to perform to patch the leak as there are multiple places you can be leaking from. Mine was dripping down the back of my throat and when leaning forward it would come out my nose. This surgery was no where close to the first one and I don't think it would set you back much. You are a champion AN postie and this will be nothing!
Good luck and try to be positive, you will finally be all patched up and you can continue recovering. I you do have to stay at the hospital for any amount of time I would look into getting them to give you physical therapy. This will help to keep you moving forward.
Not sure why your Doctor couldn't answer any questions, but I would give the neurosurgeon a call. You should not have any unanswered questions.
Good luck with the surgery and you will do just fine, now worries! Piece of cake