Having too little of TV is a mistake any of us will only make once. ( I made mine years ago!)
You have gotten some good advice here.
Please take this in the spirit intended. You seem to trust your dealers capabilities and that the vehicle is all set up right and that you dont have to do anymore. From my experience, your mistaken; most dealers are worthless at this stuff and get all kinds of details wrong. Mine almost crippled himself setting up my WDH. He had no clue and made assumptions because they'd been in business for many years.
YOU have to take responsibility and check every detail yourself. This may take a lot of research.
Towing a RV is like a huge ongoing DIY'r project. If one is not adept at mechanical things and does not have an understanding of all the workings, it can be at the very least, expensive and potentially very dangerous.
finally, your truck is too marginal in my opinion.
