Thanx, and nice setup. I have the Sherpa cargo rack. I bought a large plastic trailer tongue box that fit perfect in the bed, but I can't fully open the lid, so I returned it & will just "open" carry stuff using straps. Valuable / weather sensitive items will be kept in the trailer. To keep 50" width, I will put one rotopax style container on each side of the Sherpa, not sure what to do with the third yet. Will experiment when I buy them.