We had a 33 class c Jayco for a few years, and now a MUCH quieter 2016 Tiffin 36la, towing a Mazda3, on an American Car dolly. I do not see any problems towing. This new Ford chassis has a 6 speed tranny and that seems a big difference to me! Once that high gear kicks in at highway speed, I lower the radio, and sip a coffee going down the road. Very relaxing. I always haul the car in Tow/haul mode and that also helps a great deal especially going down hill! Just touch the brake, and she downshifts like a jake brake.
Mileage is ok while these gas prices are decent, I would not like $4.00+ per gal again!