Camp Quest is a secular summer camp program, and the Minnesota Version of it has been growing in recent years, and needs volunteers to help. 2010 camping dates are June 25 to July 31, not too far from the Twin Cities.
Here's a brochure (PDF, 900K) with more info, and the web site is here.
If you are interested in volunteering your time please contact Minnesota Camp Quest by email.
I believe they will be happy to hear from volunteers interested in working for one week stints. According to Jeannette Watland, who is coordinating the camp this year, Camp Quest is "...rapidly expanding. In 2004 we started with 11 campers. This year we are expecting 48 minimum. With donations and volunteers we can support at least another cabin. Registration is open and we are officially recruiting volunteers to dedicate a week of their summer. Female volunteers are especially needed. No camping experience necessary!"
Skill set sent in for consideration.
Sounds like a great organization!