Johnson Branch is a nice camp on Ray Roberts Lake
Roberts Lake State Park has two main campgrounds, the Isle du Bois unit and Johnson unit. These are what I would call twins. They are very similar in layout, scenery and activities. They are on opposite sides of the lake.
Johnson Branch unit has good camp sites if you have a tent or a camper. There are several walk-in camp sites and several large sites for campers and RV's. The facilities are clean. Make sure that you spend a lot of time in the lake because it gets hot.