Poor tow vehicle ride pulling trailer on certain highways

Just checking if others have experienced very violent bobbing, jerky, bouncy ride in tow vehicle while pulling a travel trailer? I have experienced this with our Tundra pulling two different Holiday Rambler trailers. One with a Reese W/D hitch and my current one with a Equalizer 4 point hitch. The trailer and truck a perfectly level as far as setup, and there isn't much if any sway at all. Is it something we put up with, or can something be done about it? It doesn't happen on all highways, but it happened on the perfectly smooth concrete I-29 highway going towards South Dakota. I am assuming the expansion joints where each section of concrete road come together were a little higher than the rest of the concrete section and a weight distribution hitch making the tow vehicle and trailer as one long vehicle is the cause. When the trailer wheels hit the expansion joints, it jerks our tow vehicle, and probably our tow vehicle does the same to our trailer. It really can bounce around contents inside our cabinets if we don't arrange them to avoid this and makes for an uncomfortable ride during those times.

Don't know if all trailers are like this( thinking about an Airstream in the future) or not. What about 5th wheels, do they experience the same problem?

Thanks for your input and experiences.