The exact coordinates on this page don’t take you to a campsite. From googling, it looks like you used to be allowed to camp anywhere along La Plata road on the way up to Porcupine Reservoir, but they stopped allowing people to camp 2 years ago because it was getting trashed. It’s all a Wildlife Management Area now and you can’t camp in it.
There appears to be 2-3 campsites just east of the WMA on La Plata that you MIGHT be able to camp in. There weren’t sign anywhere saying you couldn’t, but not sure if you really can since it’s right next to the WMA. I did see a tent in one spot and 2 other spots with old fire rings and flattened grass that looked like tents had been there recently.