Well, for about 10 years I towed a 26 foot Airstream (heavy, 1962, all oak wood) behind a 1/2 Ton Suburban. The equalizing bars were recommend and installed. Sure straightens out the ride, and balances the weight. BUT.
What a pain !!! Adding them on, taking them off, chaining, correcting, every time.
Then, in 2008, I bought a R-25, Blue Bayou, and towed it with a Ford F-350 diesel. Having had the equalizing bars before, I wanted none of it.
Turns out, F-350's from the factory only have a tow frame with 7500 lb capacity, and the R-25 with trailer, plus reasonably full tanks of lidquid, plus personal items, can easily weigh in excess of 10,000 lbs.
The solution: Buy and after-market tow frame with 13,000 lb capacity, and a much better attachment to the major frame parts of the pickup, in this case an F-350. Also, a new ball rated at 13,000 lbs.
I towed my R-25 in excess of 20,000 miles on road, from Flaming Gorge in Wyoming to Lake Powell in Utah over 2 lane mountain highways. I towed it 900 miles from San Francisco to Seattle in 2 days on I-5, going about 60. No matter what the conditions, the beefy tow frame and beefy truck made towing a breeze. I was never in jeopardy once on the highway, or at the ramp. It handled as good or better as the Airstream with equalizing bars. I would never own them again.
Inspect your towing vehicle's frame. If you're not sure, buy a bigger one, and have it professionally installed, along with all beefy towing parts. Then cruise down the highway in security.