Start here and compare with all your truck's ratings. I suspect you are over more than one of the truck's ratings. But knowing exactly where you stand now makes it easier to decide what needs to be upgraded. Until then, we internet users are all guessing.
Any RV that says half ton towable means there exists at least one configuration of half ton that can tow it under all the trucks' ratings. That does not mean all half tons can tow it safely or under all the truck's ratings. In other words, they may work for the most capable half tons. You do not have one of the more capable half tons.
