Here are two more Paramount cartoons from the 1960s.
First up it's "The Trip" (1967). Shamus Culhane is listed as a director but it's really Howard Beckerman's film, considering that he not only wrote it, but animated the entire thing himself.
Here's another "Nudnik" cartoon, "Nudnik's Nudnickel" (1967). This one has story by Eli Bauer and Al Kouzel, whom Gene Deitch has collaborated with before on other projects. Bauer and Kouzel previously worked together on Terrytoons' "James Hound", doing story on all the shorts.
That's Deitch doing the voice of the bus driver.