I don't think he'll demand crutch free right after surgery. My ortho gave me "weight bearing" status right after surgery but I spent another week or so on crutches, then some more time with a cane. It will be kind of a mental thing, you'll need some time for your mind to overcome the fact that you just had surgery on your knee, some time for you to test your knee and get the feel how much it hurts as you put more and more weight on it.
The surgery will probably be very quick, I was on the OR table for 23 minutes. There's no way you'll wake up during surgery, actually I was ****** off when they woke me up in the recovery room
it was like "Hey, I was sleeping, what the h*ll???" It was quite a restful sleep. I guess you can look forward to looking back how easy it was...good luck!