Shower above the hips and only careful washing with a washing-towel, which is not even allowed to be wet either - and unfortunately not the luxury of a bath whatsoever.
If you do PD ask you MD for a set of emergency antibiotics for peritonitis. Save a drain bag, call the dialysis RN to get clearance to use the antibiotics, rinse out your gut with a few bags, mix the drugs in the final bag, fill then go to the ER with the cloudy bag for the lab. That way if you are stuck waiting hours, your treatment has already started before you even get to the hospital.