Scary Handling Problem

Very interesting day. Our friend has an RV that is similar in size to ours and she tows a car. She says she can't even tell the car is back there. So, we took our tow car and tow bar over to her house and hooked it up. She drove it and said she couldn't tell any difference from when she towed her car. We drove it and couldn't believe the difference from when we tow with our RV. Our steering seems very stiff compared to hers. So, next thing is to have the local RV expert drive it and see if he thinks it may be something with the steering on the chassis or if we need a trac bar or steering stabilizer or both.