Hi Jana,
I had a very quick stay (27 hours). I wore athletic pants, long sleeve top and athletic jacket going in, and wore them on my way out. Slip on shoes are easy in the beginning. Wore the hospital gown the whole time in between.
I brought my make-up bag with any meds I needed in it. I too had to take a shower with the occupational therapist and they provided the soap. I didn't wash my hair after surgery and just put it in a ponytail.
I actually brushed my teeth in bed using that basin most hospitals provide for (ahem) throwing up. My husband brought me water so I could rinse after brushing. Bring a magnifying mirror if you need one for make-up, putting in contacts, etc.
Since I was in an out of town hospital for a short stay, my lone visitor was my husband. I do recommend bringing a laptap or ipad for entertainment. I could only watch TV for so long and I loved being able to communicate via email, read the news. I would hold off on scheduling visitors until you see how you feel.
I didn't need pain meds the day after surgery, but yes, don't let the pain creep up on you. It's hard to heal when you are hurting, physically and mentally.
Mindi