The drive is itself part of the event: Islamabad's city to Bhurban's cedar forest in 45 minutes is a transition that employees register as a departure from the ordinary. Arriving at a cedar mountain estate signals occasion before a word is spoken.
The outdoor setting changes the social dynamic: formal corporate dinner in a hotel ballroom maintains the hierarchy of the office; the same group around a cedar garden fire in the mountain dark does not. The informal follow-through after dinner — the fire pit, the cedar canopy, the mountain night — is where the relational value of the annual dinner actually accumulates.
It is memorable: teams remember mountain dinners. They do not, generally, remember hotel ballroom dinners. The distinction matters for the event's primary purpose — recognition and reinforcement of belonging to something worth belonging to.