Bet it tows well. I never pulled a toyhauler until this year, but have been towing dang near anything you can hook to a pickup and some that you shouldn't, since before I got my drivers license.
And the toyhauler is super predictable and stable. Partly due to over-engineered chassis (I'm at maybe 20-25% of the available payload) and partly due to axles further aft than typical TT with alot of tongue weight.
To your comment on the very stiff ride. Presume you're running 35s with a 4" lift. If you're running too high of tire pressure that will make the ride, esp over washboards and little bumps way worse.
Driving empty/bobtail. I'd be at about 50psi max Front and around 30psi rear. Look up a load v pressure chart for your size tires and base it on about 5000lbs on your front axle and around 3000lbs on rear axle when truck is not loaded with "stuff."