Here's a little after-hours treat for non-particpants.

Every year the local Morris Dancers do a little ritual the locals call "Blessing the Site" of the MN Renaissance Festival. It usually happens twice a year during the run of the festival. Below is a link to a short mp3 of the event this year. The music is a little choppy, but I caught them at the very end of their procession around the inside perimeter of the entire ring of the 22 acre site, so their penny whistle player was getting rather tired. I believe the official name for what they are doing is connected with the "Abbots Bromley Horn Dance", but MNRF participants all refer to it as "Blessing the Site." On Sunday I asked what the name of tune was that they play but the dancer I asked couldn't remember off the top of his head.

To set the scene, by this time it was full dark, and you could -just- see the Morris Dancers in their white costumes, walking single file, each one carrying a rack of deer antlers, with a couple dozen participants quietly following in their wake. You can hear the crickets in the background, and periodically one of the dancer rings a single bell. Whatever your religion it can be a moving/spiritual experience

http://historicgames.com/sound/blessingsite.mp3

Here's a similar street performance in England on Youtube with the tune played on fiddle. Although it's on a village street you can get a feeling for what it's like on the dark and wooded festival site.
http://www.youtube.com/watch?v=MXe0QL2t6Bk