Deane I'm confused after hearing these vocals demos why you have been depriving your audiences of your singing abilities. Personally I think you should start singing more & more at your gigs it adds a BIG dimension to your act for sure. Start by adding a few songs to the program and each giog add a few more until your singing every song, I'm sure they will love it once you build your vocal confidence and hear the applause after each tune..
Good Luck..