I think you at least need a tour, which is often a BS day student who can give you some insight. Admissions officer tours are different—they often know the strongest departments, so I’d listen carefully. If you ask about Y and they change subject to benefits of X, we’ll, Y is something they don’t want to talk about!
I would call ahead because times book fast. Driving by the campus is useless. Emma Willard wasn’t open at all last summer, but things may change this year.
My other source of intel is often the other families on the tour. Some are quite knowledgeable and are happy to help out.