Random thought stemming from thinking about a windscreen type bug deflector.
Suppose a frame of some type holding an Aluminum panel or even a shaped plastic panel the full width of the front of the camper and up close to it, which extends up to the top of the closed roofline, was affixed to the bottom of the over cab portion. It could have cutouts for the latches. Perhaps better, it could be attached to the front of the over cab portion to give it a lot of stiffness not just from underneath, maybe using the latch attachments screws (or slightly longer screws in the same holes perhaps).
Hopefully this stimulates some other thinking.