My daughter registered with the campus disability office and it helped with housing...when she was on the higher dose of Entocort, and therefore somewhat immunosuppressed, she was able to get housing without roommates. (The higher dose of Entocort caused her to become sick more often, and when she was sick she became sicker than others who got the same virus - it would lead to bacterial infections.)
She talked to the dietician at the campus food court about being on the SCD diet. They invited her into the pantry to see for herself the labels on cans, etc., and how food was prepared. They also kept on hand a special skillet for her, which they would use to grill meat or chicken for her, to ensure it wasn't mixed with gluten, etc. (They do this for Celiacs kids, too.) So, if you decide to try SCD or another diet, the campus might work with you.
She talked to the campus disability office about being protected in case she, for instance, landed in ER the week of exams. The office told her she would have to disclose her illness to the professors in advance. She decided not to and took her chances. Yes, the disease did get in the way, sometimes because of meds like Flagyl, and she did take an extra term to graduate, but she made it!
She was able to do this partly because her Crohn's does not cause diarrhea and was under control after the first few months of trial and error with meds/diet. For those who have D, it makes sense to disclose the condition in advance to profs if you are going to have to leave the class for bathroom visits.