Thanks for the welcome Susannah!
If I may give comments about hospital stay.....
The Avenue is a wonderful hospital and have a lot of experience with banding ops. You will be issued with hospital gown (and one that fits...and thats something they like to spruik!) and will probably stay in that the day and night following your surgery.
I was admitted the night before (Prof O'Brien requests that for all his patients) and wore my own night attire. The morning after the op I was out of bed and showered and put my own clothes back on...just make sure they are loose and comfortable (track daks etc). You will need to have a barium swallow x ray and then you will be allowed to go home.
Apart from toiletries and books, I didnt need anything else. The rooms there have phones (private room), TV etc.
I didnt have to do the optifast thing, but on the night before the op (I was admitted 4pm the day prior) the staff helped me order my dinner...they ordered EVERYTHING on the a la carte menu lol...the last supper, they said...and it was lovely, even had a red wine too. I the spent the next hour or so walking around the place to settle it lol.