Well your "officer friend" needs to head out there more often and look around more.
The Tower goes de-active on Friday afternoon and generally there will not be a single military helicopter movement there until Monday morning. If there is the off chance that there is a public demo or the like on a weekend then they take off and land while the area is a CTAF.
Nobody there patrols the railway line... especially on weekends when there is only around 20 people on the the base working. Turkey Hill, the radar site gets patrolled by road by security but that's about it.
Standard clearance out of Oakey is depart and climb to 2500 or 3500.
Guys you all need to calm down a bit... When the tower is active, they dont let people in... when its outside tower hours the skies are full of civil aircraft.