Wiggle wagons are used, but very rarely. The biggest downfall is the backing ability. Sure, they CAN be backed up, but try getting a set around a street corner, truckstop parking space, etc. I've seen a set from United, Mayflower, and Wheaton within the last 3 months.
They do have benfits like dropping one trailer in a tight area, and going back for the other when the other is full.
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Mud, sweat, and gears
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