This is not for my boat trailer, that is, the Easy Loader my Lund sits on. Rather, I use a Harbor Freight trailer I built from a kit to carry my pram, or now also my pretty light weight 11 or 12' raft on. I put a sheet of treated plywood on the 4' x 8' frame and have just been sliding my pram or raft (not hauled at the same time) up onto the trailer. I can see this operation going more smoothly if I had one of those roller bar thingies - like drift boat trailers have - on the back of the trailer deck. What are these things called, and most important, where the heck can I get one? The trailer is 48" wide, so that is the size I will be looking for.