Big truck woes

I wouldn't pull a travel trailer anywhere near that big with a half ton with any regularity. As somebody else mentioned, the dry weight on that trailer is 7600 lbs and your loaded weight is likely approaching 10,000 lbs. Plus it's just a big trailer that's going to catch a lot of wind. Save the money you'd spend on better tires and a better hitch and put it towards a trade-in on a more capable truck. If you're dead set on keeping the F150 those things would certainly help, but at the end of the day you'd just putting lipstick on a pig.