Michigan Renaissance Faire
The Michigan Renaissance Faire is mentioned in the boook Hat Trick.
The real-life equivalent is the Michigan Renaissance Festival (MIRF), which is held near Horton Lake on Dixie Highway in Holly, Michigan and is in mid August through late September.
The MIRF web site is at http://www.michrenfest.com. The Wikipedia page is at http://en.wikipedia.org/wiki/Michigan_Renaissance_Festival.
The Michigan Renaissance Festival is a commercial operation and is owned by Mid-America Festivals (see http://www.renaissancefest.com).