Country vocalists Randy Travis and Hank Williams Jr. will appear in a nationally televised concert celebrating the Country Music Assn.'s 30th anniversary. Honky-tonk man Charlie Daniels, Loretta Lynn, the Judds and Alabama are among more than 30 acts scheduled to perform when the show is taped Jan. 7 for broadcast on CBS on Jan. 23. The association was formed in 1958 to represent country music's artistic and business interests. Its 7,500 members include singers, songwriters, musicians and disc jockeys. The association annually sponsors the Country Music Awards and the Fan Fair in Nashville.