Here's a link to a calculator that may help in your decision.
That trailer has a dry weight in the area of 7700 lbs, it will gain weight on the dealer lot, and loaded for camping, it will be close to 9000 lbs.
When you add weight to the truck (aftermarket accessories, people, pets, cargo, etc) your towing capacity and available payload are being reduced pound for pound.
Example:
If you have 9400 tow capacity and you put 700 lbs of people in the truck, your true tow capacity is 8700 lbs.
I think you're looking at too much trailer for your truck.