Yes I did it, 2015 F-150 and 35 foot TT

I towed our 33' 8000lb(loaded) trailer with a 2011 Ecoboost with Max tow pkg for 3 seasons. I loved that truck!! Tons of power and handled the trailer great. I now tow with a 2001 F350 diesel and will say it does handle the trailer a little better with crosswinds. I will admit the stock 7.3L diesel has nothing on the Ecoboost with the 6spd transmission, that is until I installed a chip... :B
To the OP, Enjoy what you got and just be safe...

P.S. If I remember correctly the F150 with maxtow has RAWR-4200lbs and F150 with HD payload has RAWR-4800lbs.

Here is a pic of my old setup