Ditto, to every suggestion/opinion Kreuzfidel gave:
1) No backpack, use a duffel. If they make a small duffel on wheels that can fit under the seat, even better. My laptop even felt heavy hanging off of my shoulder. No way using the overhead. As an aside, Garramone says lift nothing over 5 lbs the first week. The fact that you will be in FL will help because you can pack light clothing.
2) I put a t-shirt on over my head as soon as the bandages came off 6 days later, but that was because I was too excited to wait to see what it would look like (my GF helped me). You should definitely plan to wear only button downs for the first week or more. Two weeks is a good bet. Don't worry so much about having enough shirts. I wore like the same two the whole time I was there (I was at NBR). The whole time you are recovering you feel like ->-bleeped-<-, so you aren't going to worry putting on a clean shirt, everyday. I just went to my local cheap clothing store and bought the cheapest, softest 3 short sleeve button down shirts I could find. I knew I would be sleeping in them, possibly getting blood on them, etc. Don't take a shirt you really care about.