"Doesn't squat" and "bottoming out" are mutually exclusive.
I really don't think what you think is going on, is going on. This is just a Northstar 950SC (popup) camper with a base weight of <2000lbs, not a Host triple-slide. My Palomino B-1500 is the same size and weight and it doesn't even get my old dually down on the overloads.
More than likely you are not "bottoming out" but rather "bouncing off the overloads." That's what happens with mine without the trailer hitched. You hit a bump and it just SLAPS you right straight in the butt, sending a shock up your spine.
You could add stableloads to engage the overload springs earlier, but that will just make the ride stiffer and more uncomfortable. Same deal with any suspension enhancement. You're just too light.
