There may be a few.

Lark In The Clear Air
Versions of Turtle Dove
Maybe versions of The Riddle Song
Castle of Dromore
Get Along Home Cindy
Skip to My Lou
Old Joe Clark
Coffee Grows on White Oak Trees
Shady Grove


But this might beg the question. Are there many happy movies, plays,books? But if there are any happy folksongs out there, I'd love to know of 'em..I'm in favor.

Frank