I had placenta previa with my daughter, who is now three. She was born by c-section at 32 weeks, and spent 32 days in the NICU. Today, you would never know. She's a healthy preschooler. The first few months were rough.
I agree that having a person on call for your older kids is a great relief. Absolutely line that person up, now. And packing a bag doesn't hurt either. You hopefully won't need it yet, but it's good to have.
I *had* all kinds of plans, that got completely shredded. I had planned to give birth at a particular hospital, but wound up instead at the closest appropriate facility to my home, because that was where the ambulance would take me. The hospital I'd originally planned to be at didn't even have a NICU. Given that placenta previa does tend to be related to early delivery, I would recommend that you check in with your doctor about what would happen if you went early, and look into what hospital you'd end up at if an ambulance had to take you there.
I didn't really have a c-section plan, but if I had had one, we wouldn't have been able to use any of it. I hemorrhaged and had an emergent c/s. The nurses washed DD off and brought her to me so I could give her kisses, and then whisked her to the NICU. They did bring me up to the NICU as soon as I was out of recovery. They'd have brought me pictures if I hadn't been well enough to go up. Not all nurses get this, but seeing your baby is really important and it is totally reasonable to ask that every accommodation possible be made so that you can do it.
My understanding is that it's actually the baby suckling at the breast that stimulates the mammary glands to produce milk. Even if the baby can't suck, you can fake this with a breast pump, so I would not worry about surgery affecting breastfeeding by screwing up the placental detachment signal. C-sections can make it harder to breast feed for other reasons - bodies don't always see the moment of recovery from an abdominal wound as the greatest moment to divert resources to milk production. Holding the baby can be uncomfortable. Help your body heal, so that your body can help your baby. Rest as much as you can, eat well, and figure out what support you need to be comfy, whatever that is. Buy extra pillows.
The prep I would do in advance is setting things up for your maximum comfort. IMO, the optimal arrangement for a mom recovering from c-section is a bed with a firm mattress, a pack-n-play with a bassinet, and a comfortable recliner chair, in a room with an attached bathroom, and a minifridge and microwave for snacks. Having TV or internet at hand doesn't hurt. I don't recommend co-sleeping during surgical recovery, because you'll be on painkillers. (Skipping the painkillers will make it harder for you to care for the baby and yourself, and can make recovery take much longer. Take the medicine you need to stay comfortable.) I say PnP rather then crib because my experience with the bassinet feature was that it was a good height so that I didn't have to bend over to pick the baby up.
I didn't have any problems breast feeding, but DD had trouble breathing, and with suck/swallow/breathe coordination, so she wasn't able to nurse right away. I pumped a lot. If you wind up in the NICU, renting a hospital grade pump for home is a really good idea. I had a Medela Symphony, and it was great, if not at all portable. Also - hands free bras are awesome.