It is great that you are searching for info now.
Like Jane said your daughters roommate will probably have meds that she needs to take. If they already know each other, your daughter may have already seen her take meds with food/meals and such. She may also take breathing treatments and need Chest PT as Jane mentioned as well.
I will throw some things out there that I know are helpful to me and bothersome to me as someone with CF (I am 24 by the way). I have always been uncomfortable doing my treatments in front of others, but can handle it as long as the person or people do not stare at me like I am strange or anything. Also it would have been nice if I had a buddy in college tell me they would wait for me before going out if I needed to do my meds first. I often times brushed off treatments because I didn't want to be left behind or have to go somewhere alone. I guess I am just meaning to be supportive, so she knows she can count on your daughter if she needs her.
I will add though I would try not to nag to much about meds. Maybe asking something like "Hey do you need to do a treatment before we leave, if so I'll wait for you" instead of "did you do your treatment today? Are you sure? Are you sure you don't need to do another" That is something a parent would do and may drive your daughters roommate crazy lol. Not that your daughter would do that anyway, but I just wanted to through that out there.
I am sure they will have a great time. I would also like to say that I'm sure your daughters roommate is in good health now. Just because she has CF doesn't mean she can't do the things everyone else does, so do not treat her different unless she specifically says she can't do something or whathave you - then if that's the case don't make a big deal of it just say alright and let it go. We are all different, so something that I may not be able to do because of CF your daughters roommate may be able to do. Your daughters roommate will know better than anyone what she is capable of regardless of CF.
I hope they have a great school year,
Lindsey
Also maybe a given - but I will say it anyhow. Smoking not that they do, but that would be a bit of a no no for your daughters friend. I hope she doesn't smoke, but I have seen stranger things. Being in and around smoke for long periods may bother your daughter's roommate.