just come with dressy-casual attire. Maybe khakis. Jeans are "ok," but remember you aren't visiting a regular college. Honestly, it's not a big deal because the officers don't evaluate you; your plebe that you stay with does and they almost always just give you the highest score (it's what I do if I think they have a shot). Just don't be that guy who looks like a.. well... tool. Definitely don't wear your letterman jacket. And bring your workout gear because you might get thrown into morning workouts.