I have a Cherokee 29Z that I pull with a diesel Ford Excursion. I occasionally get a little whipping around when pulling the camper. I have an Equalizer 4-point sway hitch, but still have problems sometimes. Since the underbelly of my camper isn't covered, I was told that could have a lot to do with swaying as air can get "trapped" underneath with no place to go. Would it be worth it to have the underbelly covered?