if you are towing a car behind you, you can put all of the crap in the car itself. No one will be actually driving the car.
Were you talking about putting a U-Haul attached to the car? Number one I don't think that's legal and number 2, even though a U-Haul trailer isn't that expensive, free is always better.
If you were talking about getting a trailer
instead of towing a car, remember we want to have a car while down there so we can get around to the places around Grapevine at more easily.