Last year at scholar's day they had a sentence or two about each scholar in attendance that they put in our packet. Maybe some of the one-liners will go in there? I'm really not sure, but I'd try to keep it clean!
As far as what to wear, I wore a suit last year. It's OK to be more casual, but I think jeans is going too far. You need to look professional and, if you want the scholarship, look like you want it. Last year in addition to the Fletcher, they offered study abroad scholarships (not sure if they're doing that this year but my point is that there may be other opportunities than the Fletcher). General dressing tips: make sure your shirt is ironed, don't wear sneakers, don't look like you just rolled out of bed, girls-do not wear a low-cut shirt.