Uhaul trailers are kind of short. Regular cargo trailers are taller and give you a lot more space inside. Try to make sure that the front has a V shape. The flat front cargo trailers can get sketchy because of the wind resistance from what I've been told. If you have a camper top it should help with the air flow. The most I've towed was a 6x12 with a v shaped front full of everything from my one bedroom apartment with my washer and dryer in the bed of the truck. Pulled everything with no issues. Plus the 4 people adding about 1000 pounds of weight. But still no problem. Just leave a lot of space in front, I feel like the brakes are weak if you are towing near the limits of the truck.
