We purchased the Rockwood A214HW in March and our TV is a 2006 Lexus RX330. The dealer was certain that we only needed a sway bar and that a weight distribution hitch wasn't necessary. From my own research and experience, I could tell the dealer had no idea what he was talking about. He must not have had the WDH in stock to install.
The tow rating on the Lexus IS 3500 lbs with a 350 lbs tongue rating. I went to a reputable hitch installation company to have a WDH installed. The trailer pulls easily, even up mountain passes and on windy two lane roads.
The Lexus was never really intended to tow anything and the A-frame is the heaviest thing I have towed with it so far. I installed the class 3 hitch myself years ago and pulled utility trailers and a PUP with it, but everyone was under 1200 lbs. Before buying the A-frame (listed as 2635 lbs) I had a 7 pin connector and brake controller.
To avoid extra weight, we do not tow with any water on board. We do store all our food, gear, and clothing in the trailer and pack the car very light.
We live in Northern Nevada and are constantly climbing mountains to camp in California. We average 15mpg even with the ups and downs.
Even though I feel confident in our set up, I made certain not to exceed the ratings of our TV and to make certain I had the correct equipment to tow safely. Photo was taken before the WDH was installed.