It seems like two of the examples use the imperfect to express an intended action.
¿Ibais a Ibiza para vuestra luna de miel?
Iban de vacaciones a una isla bonita.
In English we would say this as "Were you going to go..." and "They were going to go..." We don't know if these actions were ever completed or not, so it makes sense to use the imperfect tense.
Is this a valid interpretation and use of the imperfect tense? Thanks.