One simple suggestion coming up.
Reduce the amount of military spawns in the map, such as crashed convoys, military bases etc. Increase amount of civilian spawns and guns such as small civilian pistols, farmer shotguns. Encourage players to use everyday items for survival and increase emphasis on makeshift weapons, rather than encouraging players to loot military bases and literally be the bringer of doom to the entire server.
Additionally, increase the hazard of looting military bases with higher spawn rates, encouraging players to group up for a looting run, (including player/NPC parties) or partake in quests for obtaining gear.