I don't know if Benny Chong travels, but Byron Yasui does travel and give ukulele workshops around the country. The Dallas group had him for a ukulele workshop a couple years ago. He is a professor of music at the U of Hawaii, specializing in the upright bass, as shown in this video. For the uke, he prefers the baritone for the fretboard range it provides.
And for the other size extreme, a soprano, here is what has become a classic piece.