You've spiked my curiosity: is there source for the "Kirkin' " tradition/liturgy to which you could direct me? I'm tempted to run it by the pastor of my Church.
The origin of the Kirkin' service is found in the Second World War; Dr. Peter Marshall, pastor of the New York Ave. Presbyterian Church, and Scottish immigrant from Coatbridge, which is near Glasgow, held a service for British war relief in 1941 entitled "The Kirkin' of the Tartans". Dr. Marshall was a member of the St. Andrew's Society of Washington DC, and soon the society began to participate, and in the 1950's, the service was moved to the National (Episcopal) Cathederal in Washington, where it has been held ever since. It is a Scottish-American church parade -- there is a quite a bit of myth and legend on the Internet (surprise, surprise) about the service dating from the Jacobite Rebellions, but there is no documentation for it.

Cheers,

Todd