N/A - love your visual aid, explains a lot of things perfectly!
BURD - I hope you make that cruise and you are right definitely to take any medications you think you might need and antibiotics can help with other problems that might pop up. We just celebrated our 43rd anniversary and are finally planning the trip I've been waiting to go on for 13 years. I got too sick with my UC and so on. As far as walking I suggest you take taxis/uber whenever possible. Don't know how that works with cruises... just know that's what we are going to have to do because of my peripheral neuropathy.