They can not ask you about your situation in terms of specifics but rather are there to help you get what you need, I would simply explain to them due to a condition with IBS, it would be very helpful for you to have a
DAS so you can limit the time waiting in line as will Be easier for you if you suffer an attack.
I have never had to really explain other than to tell them I have severe back issues that make standing or sitting, without being able to stretch and move difficult
I really only use my DAS for the longest rides, make sure I have my FPs, and skip some of the rides as well. Now that it’s a return time, and you can hold only one at a time, I think that CMs realize that those that are asking are truly in need,,,at least that has been my experience.