Penguin Cafe Orchestra - Music for a Found Harmonium
I loved this song so much when I was a kid that my wife and I used it as our recessional song. I was disappointed to learn a year or two after we were married that it appeared in Napoleon Dynamite though. Came out way back in '87.
What song will she be processing into with? That may help with finding a recessional (though we chose Brian Eno's "Ascent" as my wife's processional, which is in no way similar to Penguin Cafe Orchestra, so maybe I'm not the best person to ask advice from in terms of musical continuity).