Here are links to other great resources for all things ren fest.

General

https://www.rescufoundation.org/ Provides assistance with medical costs for renaissance festival participants.

http://renaissancefestivalmusic.com/ Semi-Monthly podcast featuring renaissance festival performers.

http://www.renaissancefestival.com/ Has a forum with good information. I met many friends that became real life friends through the chatroom years ago.