There is so much to learn about the world of RVs, it's crazy. And since we have a fifth wheel, there is even more things to worry about, from the truck that tows it, to the hitch, to the king pin, I have to know about the car's gross vehicle weight, front axle, rear axle, pin vertical weight, the fifth wheel base weight and carrying capacity, total tow capacity and gross combined vehicle weight! I am probably even forgetting some other things.