All I took out of my bag was my phone, my power bank, and my hairbrush. Probably would've worn chapstick too, but I didn't bother. I packed a couple pads just in case I started in the hospital, but I didn't start my cycle until the day after discharge. Wore the same clothes I came in, but did not wear my bra when leaving. My Kindle and deodorant were neglected; I simply showered when I got home. The hospital will not like it if you wear lotion to the hospital. You're going to be given sanitary wipes to completely clean off when you are there (plus antibacterial soap to use prior to arrival).
I barely had enough energy to go to the bathroom, walk down the hallway, watch TV, and read social media. You'll be sleeping most of the time you aren't being poked and prodded for medical tests.
Not necessarily for the hospital, but I'd pack a pillow and leave it in the car for when it's time to go home. The ride home was bumpy and I coughed a lot so it helped having that brace.