Hi Lynne.
Last week I had the same surgery that you are having and I can honestly say that for me I have found it pretty good. I was only in hospital for 6 days and really did not have much pain during that time. I've never needed anything more than a bit of Panadol for pain and that was only in the first couple of days.
The things that I found helpful for hospital were definitely button up pjs but also a loose button up shirt to wear home. I also took a lip balm as the anaesthetic can give you very dry lips. I was also treated in a private hospital but still find it handy to take a few of my favourite snacks to nibble on when I feel the need and a friend advised me to take a drink bottle to make drinking water easier and she was right. In the first few days it is difficult to reach for things and so the drink bottle was easier to use.
When I came home I definately found the little cushion for under your arm was fantastic. I also found that having oversized shoe string stap singlets are great. I can step into them instead of putting them over my head and I can then wear a shirt or a zip up jacket.
1 week on I still have a large area that is totally numb and I have a fair bit of swelling but overall I feel pretty good. My surgeon has said I should be driving within a week or so and I'm already able to do several tasks around the house so all in all things are not too bad 1 week on.
Good luck with your surgery. I hope you also have an uncomplicated experience and are on the road to recovery soon. I will look forward to hearing how you go.