Here was my rear awning solution. I mounted a regular aluminum awning rail from any rv store for a bag awning. I turned it upside down and mounted it with butyl tape and stainless screws on the top edge of the roof hanging the rail track over the edge. I finished with self leveling lap sealant. When the camper is parked with the top down and I need to access the interior, I just flop the bag awning over on top of the roof and there is no interference with the camper door. The bag awning is very easily removed also if desired. The awning is a shademaker 6 foot and has the legs that can be staked to the ground or mounted to the camper somehow. This model has plastic sockets for the horizontal beams that mount just below the rail and I glued and screwed them to the rear face of the roof. Works very well so far. Bag awning was $250 on ebay, rail was $10, sealant was $10. I also added a King Jack tv antenna via Ram ball and cable inlet in back wall. Both shore cable and antenna use the same jack. If money and space wasn't an issue, you could do a portable satellite dish also.
P.S. not sure if I loaded pics correctly...