As a follow-up, went on 4 day trip towing the Fit, all went well. I had towing gear installed by Camping World, they did great job. For the most part did not notice Fit back there, needed a little more RPMs on big hills on interstate but kept up with traffic just fine. We did back roads and interstates, back roads were easy, I did notice it a little on the interstates at 65 mph but not much more than without the Fit. I did not get brakes and RV had no problem on hills with braking. First time disconnecting and then connecting back up was a little challenge but not too difficult. Thanks to all for help and advice.
Emory in MD