I'll add my 2 cents. If you live in Ontario, Canada and your total combined weight is 11000 Kilos( 24,600lbs)then you can use a class g license. If over that combined weight you require a class A ticket. It might still be called a class AR license. I have a 1 ton dually, crew cab, 4x4, long box and a 35 ft 5th wheel. Last time I was weighed it was 23,900 lbs. That's the wife and I, the 5er fully loaded with water, 60 gallons fresh, 10 gallon water heater, 50 gallon aux fuel tank in the bed and fully packed for an extended boondocking trip and/or a 3 month trip. I'm within the class D ticket I hold and have lots of room for payload. I had a 3/4 crew cab, 4x4, short box and pulled the same 5er. I was over the GVWR, now I'm not and feel much safer. You can PULL the 5er with no problem but your braking power leaves a bit to be desired. Do a panic stop and you'll find where the trailer pushes the truck. You're going to do what you want anyway, it sounds like, so have at it and good luck to you and the family.