The "On the Open Road" scene for Goofy himself. Getting an entire highway of drivers to join in on what started out as a Serendipitous Symphony ditty between him and his unenthusiastic son has to count for something. Hell, if getting a dead guy in a hearse to sing and dance along isn't awesome, I don't know what is.
The Zany Scheme of the film's for Max — He manages to turn a father-son camping trip into appearing on live television with (an Expy of) Michael Jackson.
Max using The Perfect Cast to save Goofy from falling down the waterfall.
Goofy telling Pete that while Max isn't everything he thinks a son should be, he loves Goofy.