BE CAREFUL!!! iN MY GALLERY ARE PICTURES OF A TUNDRA with a broken frame. BOTH SIDES!
The owner had a slide in camper (1500lbs empty) and a 11 pack DEAVER leaf spring. We figured about 3000lbs with his water/fridge /camping gear and other stuff that was in there.
The springs dont add to the weight you can carry , they are just for support.
Listen to your wife

. You'll both be happier

.