Going to buy a Travel Trailer but have a few quesitons

Welcome, Yes you did post in a good place. With that truck your ratings are not as high as you think. You will be far better off getting a tent trailer, and not the largest ones at that. Had as a company truck one of those with the V8. Not only was it a gas hog and a hot rod, but as for towing or carrying much it was not a good choice. Your biggest problem with towing is wind resistance. This can kill foreword momentum really fast. Keep small and light and low to the ground are your best choices.