I found that wearing the camera on a short lanyard around my neck seems to work well. Then I don't have to wear a hat or something goofy on my head/chest. Then you get used to turning your body as the truck goes by vs turning your head. Kind of like batman. lol!
Can post up a few photo's later. It's totally hack, but I couldn't find anything out there made like this. Only head, arm, chest straps or harnesses. I didn't want to look like I was diving into an S&M video... just wanted to record my trucks! lol