You'll need to study and learn how to play the Call of Duty: Black Ops 3 maps to be a better player. You don't need to camp to use map design to your benefit. Knowing the layout and popular camping locations can earn you easy kills by helping you avoid walking into a camper, and instead getting the drop on them.
Use the playlist above to see where you need to look on the map for important locations. There is a look at the overall map layout at the start of the video that will show you the lanes and how they connection.
It may also help to play an offline match on some of the maps to explore and practice the fastest ways around the map.