I think it should be REQUIRED that people spend time sitting with a beer(s) contemplating their trucks before starting a project.
I've recommended before when the truck is on a lift or jack stands - just lay on your back or a crawler
, and MEMORIZE the bottom of the truck. Then when you're on a lumpy trail, choosing a line to take, you can fit a mental map of the undercarriage and especially the frame rails and the sensitive bits, to the visual you have of the rocks and hazards, and often choose a good line without needing to be spotted. Or self-spotting, which is really annoying to do if your door is hemmed in or tilted 20 degrees up, down, or sideways. It's a fascinating 3D puzzle, with ten decisions a second to make.