I've got both. Really depends on what you want out of a trailer. I have a Datsun pickup bed that I refurbed, and I am just about done with a mini camping trailer.
The datsun is an awesome trailer, but just is too big for quick camping trips. Lets me bring way too much stuff! And I couldn't for the life of me get a tonneau cover for it. So I built a smaller lighter more off road oriented trailer. But the dirtbikes don't fit in the little one, so now I have two.