Yes I would use a teflon plate. It is designed to reduce the friction and wear between the hitch and trailer pin box regardless of whether it's a Trail Air or not. Without the Teflon plate you still have metal to metal contact.
Steve & Jean
Furbaby - T.J.
Towmotor - 2013 Chevy LT DRW Duramax/Allison
5er - 2013 Cedar Creek 36CKTS Classic Champagne Touring Edition
Can you tell us what the factory charged you for the TrailAir?
They charged us the rally price, I don't know if that's what they are charging everyone. We were treated very nice at Cedar Creek yesterday, the hitch was $578. As always I am treated more as a friend at Cedar Creek than a customer, if I should ever buy another camper I'll look no further than Cedar Creek.