Is a 28 foot TH too much for a 2013 F150 with 5.0 V8?

To the original poster... does your 2013 F150 have the heavy duty tow package? Or whatever Ford calls it now. Some of the newer F150 trucks have remarkably high tow ratings, like 10,000lbs or more. Your truck might be "factory rated" for that TT.

I think you would find that a larger, heavier truck would give you a much more comfortable towing experience.