I was watching youtube and the kydd folks just got a F450 to tow a big 5er. One comment they made was mud flaps are required on a dually. Are they really required by law in some areas?
^ Who cares... OP could just read the motor vehicle regs for his state, or not, or choose to put mud flaps on to save his paint and the guys' windshield behind him, or not. These are the type of life altering decisions that makes rvnet sooo fun!