I would NOT recommend trying to sneak any animals into a dorm room, trust me, I was almost kicked out of mine last year because I too thought that snakes in a rack wouldn't be noticed.... Yeah its not a good idea to break the rules of the college even though you want to. College dorms DO NOT allow any animals except fish, and the tank must be less then 10 gallons at that. It will be tough, but keep the one animal you have at home with your parents for now, and after the two years of you having to stay on campus is up, move to a place off campus that allows caged pets, and find a roommate that will put up with it. Trust me, you do not want to go through the stress of getting kicked out and/or potentially losing your animal. It's just not worth it, and the animals will still be there once you get into a place where you can actually have them.
Also, the college has every right to do whatever they want with the animal you sneaked into their dorm, and in most cases if they find something, you will NOT get it back. Seriously. Be responsible, and wait.