I, too, have looked at the trailers at Harbor Frieght and Northern tool. They look like they would be plenty substantial for hauling these lightweight little cars and all their attending equipment. I would definitely opt for one that has the 13" wheels. That way, if you have tire problems on the road, tires are readily available just about anywhere. It would also be an easy job to enclose one of those little trailers to make it lockable and weather-proof for those overnight trips to some of the races.