Just too many variables to give good answer, but here are a couple of thoughts.
How heavy will the truck be, with full fuel, all passengers, gear, ready to camp? If you know this number, you can look in owners manual, for the GCVWR, to see what is left for trailer.
A tow rating of 7,500, likely is not figuring a high walled TT, the reason most manuals mention frontal sq ft of trailer limitations.
Another thought when trailer shopping...no way to know what the LOADED trailer will actually weigh. You can use the full GVWR sticker on trailer, or some use trailer empty wt, and guess what will be added (1K-1.5K).
In any case, you will not want to tow a 7,500 lb TT with that truck.
Jerry