This episode makes it seem like Roy is nervous about going on TV, but there was already an episode where Johnny and Roy were on TV and Roy handled it perfectly, even actually bailing out Johnny when he froze during his part.
Incorrectly Regarded As Goof: Although it is revealed in Season 3 that Johnny suffered from stage fright when in front of the camera, it doesn't mean that by this time he would still have that problem. He could have found a way to have resolved that issue, by this point.
Engine 51 reports to an illness and injury at an amusement park but are told they can't drive right up to the rides. All amusement parks have vehicle access for emergency vehicles, delivery truck, maintenance vehicles, etc. even in the 1970s.