That motorhome got 6mpg empty. Now its probably going to get 3 gallons to the mile. Montana law states that Both trailers cannot exceed 66'. So your trailers can be 66' plus whatever your truck is. The optional permit for $75 a year allows you to go to 46,000lbs gross. 14'6" tall, 15' wide (over 10'6" has to have oversize load signs and a light, over 12ft you have to have a front ******, over 15' front and rear escorts) and 95' long on trailers plus whatever your vehicle may be. Both trailers must have brakes, chains, a controller and break away box for EACH trailer. I dont know about you guys but if both my trailers break away from the ball on the GN the LAST thing i want is that sucker to be following me as it flings around. I tend to not haul doubles unless they are empty during daylight hours. I will haul doubles with scrap iron at night like 11p to 5am ish so I dont have some old lady cutting me off and then pancaking her. People think that 100ft of vehicle can stop like a go cart.
Oh BTW Montana allows you to set your own GVWR when you register your truck. at $2 per ton of added weight over 16,000lbs. You basically you can make it whatever you want. MCS officers also said they do not care what your weight on your pickup is as long as you do not exceed 1.5x the weight restriction on the tires of what you are hauling it on. They dont care how much I weigh, but they weigh me everytime i get checked. weird eh?