So there are three ways to get this. Firstly, after you "discover" a camp location you need to come back and speak to the three people that give you bounties. If you do not, and turn off your Xbox you can lose credit toward locating the camps.
1.) You can join a friends game that has already has the camps, you can open the map, fast travel to their camps, and it will "discover" them. I recommend getting as many camps as you can, they make the game a lot easier.
2.) There is an excellent guide located here. It displays the camps on the map, use the directional pad to go up or down on the map. There is also a video if you cannot find them. Admittedly, some of them are hidden very well. http://www.powerpyx.com/monster-hunter-world-all-camp-locati...
All credit should go to this respective author PowerPyx and their website PowerPyx.com
3.) You locate them on your own while exploring. As I said, some of them are hidden quite well. You can find them by looking for 'nooks and crannies' on the map and usually a small space to crawl through.