| Explanation | Artist |
| Hippies mobbed his house. | |
| No spot for his wife's band. | |
| Their pianist quit the band. | |
| Thought it would be a bust. | |
| Had a place in another festival. | |
| Were bored of the festival scene. | |
| Their secretary mislead them. | |
| Booked for a show in Paris. | |
| Already had shows planned. | |
| Scheduled on 'The Dick Cavett Show' | |
| Declined to do 'Happy Trails' | |