Weight wise and vehicle wise, you're just fine.
I don't understand the "second sway bar" thing. Is one not enough? How bad was it with none or 1 sway bar? Have you actually just taken 'er out for a rip down the highway at warp speed and see how it handles? Beats internet experts telling you you're 2 cans of beans heavy on the left side and make sure your tires are at 63.2 psi....
And Expeditions aren't "3/4 ton" or class 2 rigs. Doesn't mean it's not capable, just a considerably lighter duty than a 3/4 ton.
Have fun camping!