HI YPJT,
I don't think you can get Code 3 into The Oaks.
The airfield is in the middle of a small valley.
I've been there a couple of times and I am surprised there is an airfield there at all, but good luck to the guys who love the place.
No matter how much we hate the major Telcos who appear to be putting the mockers on our aviation activities, there must have been an Aviation study done by someone with qualifications, for council to approve the DA. Are you aware of such a study provided to the council? Who did the study for council?
On the Sydney Rec Flyers website there is mention that you have to climb the "airstairs" to get decent mobile coverage. Maybe there is a customer demand in THE OAKs that outweighs the interests of aviation. There is also a diagram showing left hand circuits off RWY 34 which is away from the town and the tower.
Surely where there is a Telstra tower there must be an Optus tower nearby.
When was the last time you flew from the Oaks Carl?