At 7250 pounds dry, you will be 8000-8500 pounds loaded with 1100 pounds of TW. That is really pushing the comfortable limits of most half ton owners. But many people do it. If you have ~1500 pounds of payload, then your suspension will feel quite soft as with passengers, cargo in bed, and TW the rear axle and GVWR will likely be exceeded.
Towing a high walled TT is about as difficult as it gets for the truck for any given weight. Besides a bit parachute, the trailer also has high side profile and catches any cross winds as well. A boat of 8000 pounds will tow better than a TT at 5000 pounds in most conditions for example.
You got what you got, so try it out. Use tow/haul trans mode. Use M4 to lock out 5th/6th gears. Learn how to adjust the WDH to restore 100% of front axle weight. Flush all the fluids. Start practicing at low speeds, <50mph and build confidence as you get up to 55/60/65mph.
