I'm so pleased you like the sound of my idea! My only hesitation concerns how up-for-it the members of the board would be... the survey would probably be anonymous, but I belive most US-based teenagers are back at school...
I did try a couple of survey applications and PHPSurveyor http://phpsurveyor.sourceforge.net/
has a nice interface, has all the right features like branched surveys (set conditions on whether individual questions will display), exporting of results in various formats like Excel, and customising whether questions will display in groups, one-by-one or all on one page.
I have hosting space with a decent webhost and quite literally gigabytes of unused bandwidth, as well as an easy-install system called Fantastico that takes the hassle out of installing web-based software, so I would be happy to do it if you don't want to/don't have the capability to/[insert other reason].