There is most definitely drug and alcohol use on campus, but it's relatively under control. Lots of students decide to drink or experiment with drugs, but it usually doesn't get any harder than pot. There isn't a great pressure to partake, either. It is usually left up to the student's own decision. If a student is wavering between trying or abstaining, it is probably a good idea to wait and be sure of one's choice. Just firmly say, "No thank you" or "Not tonight," and people will understand and not give you a hard time.
There are of course penalties and consequences if caught. For first-time offenses, it is usually just a write-up and a deferred fine; that deferred fine and another one on top of that are due upon your second offense. It only increases from there, and after so many offenses, a student can either be removed from the residence halls or removed from the College itself. Lots of people make it through college without any write-ups whatsoever, but some have several under their belt. The first time, it's usually more of a slap on the wrist and a warning. The best rule of thumb is to be smart with your decisions. However, when you choose to partake in either drugs or alcohol, even the smartest and most careful students get written up sometimes. It's just a choice that you have to make and be prepared for any and all consequences. You're an adult now, and at Ripon College, you're expected to act like one.