Something doesn't seem right I towed same setup and even without equalizer and sway was like nothing back there Maybe try a new hitch setup. I'm not an expert on towing but just had same setup I know tow a hideout 29bhs with no real issues
I got a 5.7 crew cab. My Jayco is loaded to the gills. The truck bed is lightly loaded with my bikes. It pulled my camper like it wasn't back there. I did have some sway on the interstate with a strong crosswind and 18 wheelers passing. I had my sway lightly cranked. Gonna put it tighter for the rest of the drive tomorrow. The ride wasn't as smooth hooked up as my old 00 silverado 2500 put it was WAY more powerful and comfortable.
So what are my options for stiffening up the rear suspension without it ruining my unloaded driving?
Id do airbags. I had same setup but ran no equalizer or sway and had no issues whatsoever. Are you loading bikes being bicycles or motorized. I'm now towing a hideout 29bhs over 7k dry and with equalizer bars no issues