Wayne and Garth have to clean up after the Waynestock event. They are supervised by the Indian, who has a tear running down his cheek after looking at the mess left behind. Wayne (to Indian): "Don't worry, we'll clean it up."
When you see all the crowd jumping up and down, look very closely and you can see Wayne and Cassandra hopping with the audience.
Just like in the first movie, the performer for the extended version of the Wayne's World theme song (used during the end credits) is listed as "Wayne & Garth (Mike Myers & Dana Carvey)"