Frankly, I don't really have any specifics to add like ericatbucknell, but I will tell you that the party-scene stereotype is nothing to fret about. I've never drank, partied, smoked, etc., but I feel 100% positive that I'll fit right in.
That and I know a relatively sufficient number of kids who aren't completely into it either, who will be attending Bucknell or already attend.