Hi and welcome!
A couple of things that I recommend bringing to the hospital are a robe and slippers, underwear and socks, chewable GasX, Cepacol throat lozenges, butterscotch hard candies (or your favorite flavor), toiletries (like toothbrush, toothpaste, deodorant, etc.), magazines, book, laptop, and a cell phone with charger. If you sign up for Netflix now, you'll be able to watch movies instantly from your laptop.
Good luck with your surgery, and please keep us posted on how things go!
Cecilia