Not that there's anything wrong with organic chemistry, but I'd suggest trying to get into a small-ish humanities/social sciences class if you can (I know you sign up for class visits through the admissions website, but if you email the professor of a class you find in the academic catalog and ask to sit in, he/she shouldn't object). That way, you'll have a good chance at listening in on some class discussion, which might give you a better idea of the student body.
Also, if you end up eating in one of the dining halls and find it a bit chaotic, don't worry. Since the term just started, they're still getting on their feet (sometimes missing forks, cups, trays, plates, etc.

).
Have fun! The weather's great right now.