I found this 1980 Kings Dominion show schedule on the KD Golden Years Facebook site:
Kings Dominion did have an entertainment department that was on par with Busch Gardens back then. Look at the number of performers in each show and the number of shows that had live musicians. The variety of shows was pretty good as well.

Kings Dominion did have an entertainment department that was on par with Busch Gardens back then. Look at the number of performers in each show and the number of shows that had live musicians. The variety of shows was pretty good as well.