I would just add regarding outfits: dress for the weather! We had a sudden cold spell with rain and suddenly my best laid plans for outfits went out the door and I had to wear pants and my Ugg boots (!) (which I remember someone in a post somewhere here brought up as the horror of horrors and I kind of chuckled that I was exactly that person!).
My DD had brought some really cute, feminine sneakers for casual wear, and she ended up wearing them with her more business-y outfits in order to walk in the sloppy cold rain. It was totally fine.
One final observation – the week we did interviews, I found the moms to be smartly dressed, but more casual than true business attire. I ended up feeling my best when I switched from suiting pants and blouses to regular slacks and a nice sweater (and yes…uggs). (and not even real uggs at that – doing my part to keep it classy.). (that’s a joke) I did it for the weather, but then stayed that way even after the rain stopped later in the week.
(But jeans and leggings and yoga pant type stuff? I don’t think I saw that anywhere in applicants or parents.)