Do you have secondary springs on the rear axle?
Either way, maybe stable loads are in order. But, as always, get the TC on before finding you need any suspension upgrades.
Since you have a large RV already, it would be good to have a small TC on the other end of the spectrum, especially for just two people. Since you are used to 'semi-luxury' in the big-mo, and if I were going out and buying a truck camper right now, from what I've seen, it would be the Lance 865. Be sure to look that one over to see if you could live with it. Here's our same-size camper on the Mojave Road in March: 86" Wide; 10' 3" High; 8 foot 6 inch floor:
regards, as always, jefe