Think about what you would need on vacation, clothes, soap, maybe a pillow, food, water, ect. If you live close to the hospital it won't be a big deal for him to go back and get things. Snacks and toiletries (toothbrush, soaps, etc) are probably the most important, anything else you can get later or the hospital will give you. Bring extra panties for yourself, you don't want to go home in the hospital ones YUCK!
whatever you would pack for yourselves to sleep in a hotel with no access to your own home for 2 to 3 days - and if you forget something your husband will most likely be happy to get something from a quick store run and since he is out of the hospital maybe he can pick up some edible food for you too!
Bring a nightgown. I usually sleep with sweat pants but I took a nightgown to the hospital because they are constantly checking you. I was sore so it was helpful to just lift the nightgown rather than messing with getting my pants on and off. Also bring toiletries. My hospital didn't provide any shampoo or toothpaste but I didn't know so I didn't bring any. Bring cards or games that you can play with your husband. My husband and I actually had a lot of fun playing games. Good luck!