The bottom line is your Expy will tow the TT. My 2009 with the 5.4 does fine with my almost 30' camper. It will really suck down the gas though be ready to let the motor rev up in the 4K range when pulling long hills.
We pack light and never fill the water tanks an carry nearly everything in the camper, not the TV. I personally don't think the length is that much of an issue, like others have said it is payload.
Believe it or not the only vehicles that move me around when they pass are a motor home, or something like a UPS truck that push a lot of air. Aerodynamic trucks and semis are not a problem now that I have my WDH set up correctly.
Sure, I would like to have a 3/4 ton diesel, but that is not in the cards right now ... so I use what I have.
