Please do talk to us. We're fairly normal and it's usually the second years and most remember being on interviews still. Your guide can't tank your chances so ask whatever. Nothing worse for us than being there and having no one talk or ask questions. Ask the things you wouldn't ask faculty. Free time, social events, all sorts of things.
No problem there! I find the students to know the ins and outs of everything which is uber helpful. With that said, my bf and I were thinking of making a get-away out of it... any recommendations on nice hotels and sights in Springfield?