I agree with both comments. Now personally, as a Microbiology major, I don't have to type documents on a daily basis; none this year, actually, since I'm taking all math and science based classes. Regardless, it wouldn't make sense to get an iPad right now without having a computer at home.
I have a MacBook Pro now and I wouldn't mind having an iPad; it would make the trip to school a lot easier and downtime between classes more entertaining (I just study in the library so I can't really complain) but it wouldn't really help me get things done.
Get a solid laptop like a MacBook Pro. Something that's going to last you for the entire college journey, THEN get the fun stuff that you could use later, after everything is paid for.
Relying on the school to use for printing or accessing things is taking a chance; there's always the situation of "forgetting until the last minute", the computers all being used (will definitely happen around finals and when the year progresses), and if it's pouring rain outside, you aren't going to treck to the nearest computer lab to crank out a paper.
You can do a lot of things with the iPad, but not enough to warrant full time use, not for a legitimate college student anyway. Of course, the major itself plays a large part, but it doesn't make sense to get one at its current price when you can get a very good computer for the same or a bit more.