OK, I grew up in North Carolina and I've been through Jacksonville plenty of times. I've never heard the name of the Marine base there as anything other than Camp luh-JUNE.
Well, it seems that it should have been Camp luh-JERN. That's how the family of Lt. Gen. John A. Lejeune pronounces their surname to this day.
I suppose this means that the next time I screw it up, I get to drop and give the man 20, huh?