Oooh, how very exciting!
I had my DTs at 36+5. We were in for 2 nights after the elcs to monitor the babies blood sugars, but I was a late in the day section. They didn’t get admitted to scbu (DD had difficulty breathing after she was born but was never admitted to scbu, she just went there for a bit before joining us in the recovery room), and were normal healthy baby sizes.
Recovery afterwards was fine, I was out shopping when they were 5 days old and back to driving at 2 weeks. It definitely hurt, but it was manageable.
Snacks and change for the vending machine would be a good idea, and a dressing gown for you. I can’t remember how many changes of clothes they got through, but I know DH had to bring extra in. I had a pack of nappies, he might’ve brought more in too - it is really a blur!
Lots and lots of maternity pads and giant knickers - pop a pad on the knickers over the scar but under your trousers, it’s utter bliss for moving around. Oh, and also get some stuff in to help you go for the first poo afterwards. That was not something I knew 
If I’m being honest, I found it much easier having two newborns than being pregnant with them. I actually got more sleep and my body felt great albeit still looked about 8 months pregnant with a singleton!
Don’t push yourself, but keep active - basically listen to your body after the section and don’t overdo it.
Also, try and take as many pictures as you can do. I didn’t during mine, and I really wish I had had more pictures.
Good luck!