I'll echo the posts about the F150 EcoBoost. We had an Envoy but it was marginal towing our hybrid and it wouldn't do for even a small hardside. The EB has a lot of low end torque, 4X4, and a 36-gallon fuel tank. DW wasn't nuts about a PU but it's my daily driver, not hers. And she's come around to its utility both for towing and hauling other stuff.
Our TT weighs 4850# (actual) unloaded so I'm probably in the 5800# range loaded. Even though the F150 has the standard payload rating it handles the TT just fine.
IMHO if you're not full timing and are towing a small trailer I'm not sold on a Diesel. DB's 35'+ toy hauler - yes, his Dodge Diesel is a good match.