After Card left in 1973 to pursue a solo career, the others collaborated with the Regina playwright Ken Mitchell on the country musical Cruel Tears. Loosely based on Othello, it was premiered 15 Mar 1975 at the Mendel Art Gallery in Saskatoon and, after some revision, was presented in Vancouver and at the Montreal Olympics in 1976 and on a 12-city tour in 1977. The Dumptrucks appeared as a Greek-style chorus in all performances; 'Humphrey' was replaced on the 1977 tour by the banjo and dobro player Bob 'Cat' Evans. Evans also collaborated with Millar and Taylor in 1977 on the ballet Goose! (based on Mother Goose rhymes) for the Regina Modern Dance Co. With Anne Wright in Evans' place, the Dumptrucks performed 'The Greatest Little Travelling Supershow' for audiences of children in the Northwest Territories and the Yukon in 1979 and in the Maritimes in 1980.
Songs from Cruel Tears and Goose! were issued on LPs under the Dumptrucks' own Sunflower label. The group also made two earlier LPs for Boot, (Hot Spit, BOS-7101, and Six Days of Paper Ladies, BOS-7106) and one for United Artists (Saskatoon, UALA-103).
Author Margaret Daly
Gelmon, Larry. 'The Dumptrucks: bluegrass country-opera in Saskatoon,' CanComp, 102, Jun 1975
Garr, Allen. 'The boys from Blackstrap Mountain,' The Canadian, 8 Jan 1977
Timson, Judith. 'Will it play in Saskatoon? Hell, it was born there!' Maclean's, 19 Sep 1977