I have friends that attende Sewanee, but never heard about kilts there, maybe it's something new. I did find out recently that marching band at the College of Wooster in Ohio wears the kilt. There is an interesting story of how that started as well:

"The Scot Band uniforms are one of the most recognized symbols of The College of Wooster. The idea of using a Scottish style uniform came in the late 1930's while trying to develop a new band uniform. Through a generous donation by alumnus Birt Babcock, the school purchased the first shipment of MacLeod tartan kilts. The MacLeod tartan had no special significance at the time other than that the tartan matched school colors.

However, those first kilts did not make it from Scotland. In 1939, that fateful first shipment of kilts was sunk in the Atlantic by a German submarine. Another shipment did make the journey across the Atlantic, and in 1940 the kilts made their debut."