I would recommend stepping up to a premium hitch such as the Equalizer. The Fastway E2 is ok but you will have a much better towing experience with the 4 point sway control of the Equalizer, also referred to as the E4. If you go this route, get the 1000lb bars. The 600lb will not be enough. Dry weights and tongue weights are grossly understated by the manufacturers and do not include the added weight of propane tanks and batteries.
2013 F-150 EcoBoost MaxTow
2013 Jay Flight 28BHS Elite
"My wheel lugs require more torque than your Honda makes!"