Motorhome sway

First trip out hauling our CRV. We have a Winnebago Aspect 26a on an E450 chassis. Just got it setup for hauling the CRV with a Blue Ox tow bar and Patriot braking system. Like usual, bumps and wind gusts and semis cause a little steering change. Typically this was one or two minor adjustments and then straight again. With the toad it took 5-6 minor adjustments, and really felt like the sway you get from hauling a trailer that is overloaded or tracks poorly. It's not terrible, but noticeable. Anybody notice something similar? Any ideas on the cause and how to fix? Thanks much for the help.