I recently picked up a Space Trailer and tricked it out with side rails, cross-bars, spare tire, and stabilizer jacks. I put some bike racks on it and the Yakima Skybox that I usually put on the car. Tons of space, rides nice, and no cross-bar noise on the roof of the car!
I wasn’t done, however. I was inspired to build a chuck box to go inside, with a propane grill, a 2-burner propane stove, a 20lb propane tank, lots of storage, and a pivoting cover that turns into a prep-counter! Altogether, a very sweet adventure trailer. You can throw a roof-top tent on it, or just clip some bug net around the open lid with a plush pad inside.