Agreed, all roads on the base, any US DOD installation should be access=private. You can make them private=military although that is still under active discussion on the forum. Think of it like this, say you’re out jogging and approach the gate of an installation. You ask a guard hey can I go in there and run around? Of course, the guy at the gate will probably say GFY especially at bases around here like Fort Meade. Permitted access tagging in OSM is for things where the public and generally get the permit. Joining the military or obtaining a secret security clearance does not meet that bar.