It wouldn't hurt to look into adjustable sway bars to help when fully loaded. That's assuming they can be adjusted stiffer than stock.
Good point. The factory Rubicon sway bar (modified to be a manual disconnect after I fried the motor) will stay up front, but I’ll have to replace the rear if/when I get that auxiliary tank. Genright suggests the Currie sway bars, but I’ll likely look into heavier or dual rate selectable options.