I'm not sure how old your daughter is?? My daughter had surgery 2 years ago (with general anesthesia) and then laser surgery last year (with general anesthesia). I found the laser surgery was a piece of cake compared to the regular surgery. They didn't put her to sleep as deeply when they did the laser and they only used a short tube instead of fully intubating her so it made the recovery quick. The whole thing was done really fast. Maybe you could ask about the anesthesia tomorrow and it might put your mind more at ease. My daughter was not really in much pain afterwards either. She was self-conscious about the bruising, but it sounds like your daughter is much younger than mine (mine is 6.)
As for the sleeping/no eating thing. My maiden name is Murphy so I totally get the whole Murphy's Law thing!!
My daughter could drink clear liquids until a couple of hours before the surgery so that might be a possibility for her. I would just prepare in your mind that you might be up during the night doing some extra rocking or soothing and then if she sleeps, it will be a treat!
A nurse should call you tomorrow so write down all your questions so you can ask them...they will go over all that stuff with you. Looking back on it, I found the laser to be pretty easy. (although at the time I was a wreck!!!!) Here's my daughter's photo album. You can look ahead to the end with the laser pictures. The bruising took longer to go away than I expected...like about 2 weeks.
Good luck! Keep us posted!