Potential festivals to attend this year?

Hi all, I’m a big fan of traditional German songs and potpourris, and as an English tourist what event which hopefully attracts a significant base (ideally multiole days) would there be in the next few months such as September or October? songs such as antje mein blondes kind, heut es gehts bord , Zehntausend Mann die vogelein I’m walde, he’ll die glasen , Drei lillien potpourri,

thanks in advance!