@cruncher
I was in the hospital in Rochester twice in Jan, 1st time unexpectedly, 2nd time I was able to pack an overnight bag. Not for spinal surgery, but a few suggestions for a hospital stay.

I used the hospital gown as both a gown and a robe. Just put 2nd one on backward. Works better than a personal robe because the snaps at the shoulders allow it to be used with IVs. I brought my slippers, but they always give you the socks with grippers.
Of course phone charger, if you have one with an extra-long cord, that works best. I was able to plug into the outlet behind the bed and reach it from the bed. I took my laptop, but that is up to you. It was a good time to clean up email, delete old things, etc...

Another thing found helpful is to take a notebook and a pen. Then if think of questions, can make notes to ask providers when they make rounds. And take notes when providers give you updates. I also made to-do lists for when I got home.

The hospital provided basic hygiene items, though 2nd time I brought some of my own. I like to have baby wipes or something similar close to bed.

I was mobile, went to the hospital library, and checked out puzzle books like Sudoku. You can bring your own or ask if FL hospital has a library and can deliver. Also, it might be a good time to read a book you haven't had time for. If you crochet or knit, good thing to do in bed.

I watched a lot of movies on TV. Surprised they had some new releases.

Good luck with the upcoming surgery.