M husband had to cope with this at his college, too. Private showers weren't an option - the best they had was dorms of 4 students sharing 1 shower or a whole hall sharing 4 showers.
His showers take 45m-1hr, followed by the 10-15 minutes of creaming and whatnot.
1. go back to your room to do the creaming instead of doing it in the shower. You won't feel so rushed if there's someone waiting for the bathtub.
2. rearrange your schedule so your shower doesn't interfere with classes or with your sleep schedule or your dorm mates. Maybe a mid-afternoon shower between classes would work better?
As for the creaming time, there isn't much you can do about it. We're 30 and have been out of college for 6 years now, and it doesn't get any better once you're in the work world - but at least you don't have to share your bathtub with random strangers!
Ichthyosis-en-Confetti Type 2
Husband, Nathan - 10, Elliot - 7, Oliver - 4, all affected.
I also have an unaffected daughter, age 8.
email: jennifer at confettiskin dot com
facebook - find me on "ichthyosis mommy spot" or "friends of ichthyosis"