BKMSTR, I use to have a F-150 crew cab, we built a wooden cap on the on the top of the bed to carrier the bou back .we would put six animals top and our gear under it in the bed. it works well, alot of hunters use this style up there, it keeps them from having to bring a trailer. My new truck is a f-350 and I still use the wooden cap method for bring back our caribou.I find each time I build a new cap the design gets better.
Last year one of our guys had a truck with a fiberglass top, we put the bou in the back, covered them withone of those bluetarps, put there gear on top of that...everything stayed dry.