We are driving a 1978 Viking Litter Gasser from Iowa to the Fort. It is a small pop up and it does not have brakes on the trailer. I have been told by some people that we will not be allowed to go through the mountains because the trailer doesn't have brakes while other people tell us that is does not matter because our trailer is so small. Does anyone know for certain if I can go through the mountains or will I have to go through the pan handle and over?