OMG, that sounds just like me a couple years ago!
I had 4 month old, exclusively breast fed girl. I had the surgery laparoscopically, and was home the same night, but it was still a whole day affair. Not fun.
I had husband with me, so I could keep the baby with me, nursing, up until they wheeled me down the hall - that was about 2pm. The surgery was done by 3:30, and I was awake by 4 or so, but sooooo out of it! I did not nurse the rest of that day, but once I got home (around 7:30pm) I did have a friend help me pump (that was awkward, but for real, I was NON FUNCTIONAL). We dumped that milk. By midnight or so, I was able to nurse again, using a bizarre, pillow-assisted reverse football hold. Uncomfortable. By the next afternoon, I was feeling better enough to sit up and nurse more or less the regular way again, with serious pillows and such to protect my incision. I was quite uncomfortable for 2-3 days, but I was feeling better little by little. I did my best to knock off the pain meds as soon as possible, because I didn't like the idea of passing that to the baby, but seriously, I never noticed any effects in her. My husband stayed home for 3 days (1 on surgery day, 2 after), and was a total sweetheart. He would bring me drinks and make me sammiches, and keep Genevieve until she was ready to nurse again, then whisk her away. That part was pretty cool, frankly. :D
If you have a few days to save up some milk, I would definitely do that. If that's not possible, and your baby gets a bottle of formula, or even watered down juice for a feeding or two, it's not the end of the world!!! Your husband should take some time off, if at all possible. And don't be surprised if he totally steps up to the plate. He can handle it! And so can you. Good luck with everything.