I've seen a few 80's with ladders attached to the rear hatch. Is the hatch actually strong enough for somebody to climb this without deforming the metal? I'm thinking about having a ladder built, or going simpler, and having a grab bar installed using the spoiler mounts for better roof access. I do not have a swingout bumper, and I don't plan to get one either. I'm in and out of the cargo area too much. Any insight is appreciated.