Well, looks like you've heard everything from "YOUR GOING TO KILL A BUSLOAD OF NUNS", to "let'er rip, you'll be fine". Now to figure out where you are between the two ends.
IF, and I say again IF, all your number are on target, and, IF you are not a wet behind the ear newbee, the numbers look like you are within spec. But, like said before, with a proper setup on the hitch, and like seasoned travelers, keep the speeds down to within reason, and, drive well ahead of the hood, baring the red-light-runner, you "SHOULD" be good. But like others have said, run it over the scale just to be double sure.
Another thing to think about is something many of us have done, go to a stiffer sway bar. Many of us, me included, use the Hellwig bar, but others have come out no, so I think there are other options. All it does is get rid of the excess body roll, and helps plant the rear end a little more. It is not intended to add load capacity, so don't think it does.
So, happy travels, and be safe.