The tummy binder is largely an American thing, and that is partly because in US hospitals, open procedures are far more common and the incisions tend to be bigger than they are here. You could ask your consultant or cancer nurse about it - they might say it's best not to 'suffocate' your stitches, but see what they say. They might just say do it if you want to, but that as far as they're concerned, there is no actual need to.
I haven't heard of anyone in this country doing a bowel prep for this op - I certainly didn't and unless someone on the site can tell me otherwise, I don't think anyone here has either. These days, as long as you don't eat or drink anything after midnight on the day before your op, there's no real need to give you an enema. Anaesthetic is a lot more advanced than it used to be, so this just isn't necessary.
I must admit, I did really wish I had a downstairs loo after my op! It took me ages to get to the loo, because you are shuffling about, and rather slowly at that, after your op. If you've got a living room and a bathroom on the same floor, I'd stay there!!
Did you have any luck with asking your cancer nurse to clarify things regarding your open procedure?
Love, Annabel. x