I should clarify that, when I said that the discomfort was moderate, it was enough to make me moan aloud when the scope pushed past the prostate, then all was o.k.
Urologist was concerned about urinary retention, pending results of urodynamics testing, and mentioned possible of intermittent catheterization.
If the problem does not clear up, I asked him about options to help me during long trips - cruising - to eliminate the possibility of bedwetting at night and to somewhat reduce overall diaper usage. I am talking about 25-30 day trips - normally a LOT of diapers unless I can resupply. I cruised for 30 days when wearing diapers and being only bowel incontinent but I now require a significantly greater number of diapers due to the added bladder incontinence. When I asked about the possibility of using a condom catheter at night, my urologist mentioned intermittent catheterization instead.
I will note here that the best medical solution may not turn out to be the best travel solution from the viewpoint of having to live with it. We just cannot ask the cabin stewards to deal with wet sheets and it would be wrong to send wet diapers to the ships laundry. Some cruise ships do not have washers and dryers available to passengers. However, I think the ship we are planning to go on next does, so that I could occasionally wash cloth diapers. I still would wear a disposable underneath to try to keep the cloth dry. It could be that intermittent catheterization at bed time then wearing a cloth diaper just in case would be an option - if I could stay dry long enough and that still is TBD.
Why now? Bucket list, of course. I am getting older and if some things are put off much longer they will never happen.

I would like to get in two more cruises before I have to stop long travel.
One cruise we are looking at begins and ends in London. London would be excellent for diaper resupply.

No problem getting diapers delivered to the hotel. Local supplies reliably available in certain retailers. We would spend some time on the ground touring from London either before or after the cruise.
Perhaps I should start a new thread on this topic but I am not sure there will be enough interest. Let me know. Possible title - Diapers, Enemas, Catheters, and Cruises?
--John