Unless you are hauling a lot of smaller loose packages I don't see the advantage to the Cargo Buddy, I would buy the regular Cargo trailer and build/buy a box to fit, something like a large rubber maid container. I have never seen a Wike trailer so can't comment on that aspect of it. I like the Rubbermaid Action Packers I used them in the back of my pickup for years, come in a variety of sizes.

Aaron