J.D. Roth spent 15 months driving across the US for a trip total of 35,000 miles.  Driving an RV has specific challenges and limitations, but also allows for an amazing tour of the states.  Which states have the worst drivers?  What ARE the rules to driving in Southern California?  How do you merge onto the highway next to an RV?  Liz and Toni tackle theses questions with J.D. and help us all avoid ticking off the driver with the bigger vehicle.