We just purchased a 2006 Fleetwood Excursion 39L and will be towing a 2005 Honda Civic with a Blue Ox towbar. The dealer is telling me that the need for auxiliary brakes on the toad is based on the state or province of registry, not the area you are travelling through. Does this sound reasonable??? I don't have aux brakes and wonder whether I really need them. I realize that the added weight will affect braking but it seems like an awful lot of money to invest if it's not really needed. Suggestions?????????