@gigi32 -I am looking at an updated packing list, and I see the same items that I remember from when I packed my bag 17 years ago. Things like: insurance card, ID, (valuables like jewelry shouod remain with caregiver or at home) current medications, eyeglasses, contact lens, hearing aids, dentures, along with personal toiletries, and digital devices with chargers seem to be commonly suggested. I personally included paper and pen/pencil for notes or doodling!
As for clothing, the key is Comfortable and Easy on Off. The patient will be furnished with the lovely hospital gowns and slippersocks! However the patient will need underwear, and comfortable clothing when he begins to become mobile. "Think" soft, larger than normal size, and easy on/off elastic waist pants, and loose fitting top. A sweater is very helpful because hospital hallways are usually cold. don't forget shoes od slipper for going home!
Gigi, Since you are at Mayo Clinic in Rochester there are plenty of places to purchase anything that you might have forgotten. Do you live at a distance? Have you looked into The Gift of Life Transplant House?