I began a project of creating songbooks and sheet music that were especially formatted to display comfortably on a Kindle screen. My first publication is called
Heartfelt Carols. Christmas Songs for Tablets and e-Readers. There are better free samples on my site about sheet music for Kindle and other e-Readers, as well:
http://www.heartfeltsongs.com.
The PDFs look great on a small tablet screen. I know some people hate reading pdfs on e-readers because of all the scrolling, panning, zooming, but these fit just right. ;D
Anyway, if you like caroling it should work great. And don't feel too self-conscious in carrying your kindle around from place to place through the night... ;-)
Regards,
Eduardo