I STRONGLY suggest the Max Payload package. It gives heavier springs, heavier brakes (I think) and heavier tires. It also gives you an extra 1,000# of payload. All those high tow ratings were for trucks with this package. It will have a higher rear end ratio, thus poorer gas mileage, so they may be hard to find.
Those max tow ratings advertising loves to brag about are for a BASE XL model, max tow option and little else. Two passengers and full gas tank. No luggage. No cargo. And you usually see them pulling a load of lumber or bricks, NOT a camper! Every pound of weight added in the form of options, passengers, cargo, bigger cab, longer bed, etc must be subtracted from that max tow number.
Honestly, the following is a much better way to evaluate tow capacity.
Find the yellow border placard on the driver door latch post which will state the weight of all passengers and cargo shall not exceed XXXX lbs. This is the Payload for THAT truck as it left the factory with all options installed.
From this number, subtract the weight of all passengers, cargo, car seats, tool, toys and lumber you will carry in the truck. Subtract 80# for a WD hitch. What is left is the max tongue wt you can handle.
Multiply this number by 8 to get the max weight - that is GVWR - of the trailer you can safely tow assuming 12.5% tongue wt.
Multiply max tongue wt by 10 to get the absolute max GVWR trailer you can tow. This assumes 10% tongue wt, and is the absolute minimum safe tongue wt % (tongue wt / loaded trailer wt X 100%)
Remember also that TT is a BIG sail you are towing behind your truck. It catches lots of wind from passing trucks or natural gusts of wind that can push you all over the road if the sail is too big, the truck too small or the wind too strong. The guy who said No Problem has 10 posts, and I never heard of him before. There are several folks with hundreds of posts who have recommended to keep the length down closer to 25 ft. I know them. They know what they are talking about with thousands of towing miles behind their advise.