I've got a few of this type of frames in different sizes. The main part, on the left, is hinged at the top and has a very small chain on each side so it opens to a solid position each time, although, if terrain necessitates, you can open it less and it still works. The main frame has two loop eye screws in the bottom of the top cross piece. The small, inner frame, has two eye screws in the top cross piece. When the main frame is set up the inner frame hangs from the eye screws and this always gives a vertical target. The inner frame has a very small eye screw in the outer, bottom corners. The main frame has very small eye screws in the outter legs down towards the bottom. This allows me to use a very small bungee to hook the inner frame down and out to the outer legs so it doesn't move if the wind is blowing. I buy paper in rolls sized for the inner frame and attach it to the inner frame with masking tape. I then use stick on orange dots sized for the appropriate range. I can write all pertinent data on the paper, roll it up and store it for future reference. They are made of throw away wood so if they get shot up I just replace them. They weigh very little, are easy to carry and set up and stack flat in the truck for transportation.
This particular main frame is double 1x4 material. That's really heavier than needed. All of my other main frames are single 1x3 material with lapped corner joints and it's plenty heavy enough. It also makes them lighter if you have to pack them very far.