I think that depends upon the school. Have you had any one-on-one interactions with the faculty? Were they friendly? I remember when I was looking at schools in the fall, I was warned that certain schools were more receptive to visits than others. But in this case, if you are high on the waitlist, could maybe be a good way to show your interest in the school? I don't know. Interested to hear other thoughts, but I am in the same dilemma.