I had an 19' Ultralite (~2,500 lbs) and towed it with a 1500 GMC PU and an Acadia. I towed it with both vehicles with and w/o an Equal-I-zer weight distribution/sway hitch.
Even with that tiny trailer the ride difference with a 'properly' set up WD hitch is amazing. I would not consider going any distance w/o a WD hitch. So much smoother over dips and bumps in the road. Even stop & go traffic is smoother.
The key is properly set up. The instructions are simple it just takes a little time and a level spot. If your RV dealer doesn't need your tow vehicle to finalize set up they're doing it wrong. You should also re-check it after loading everything up. The only 'special' tools you may need are larger sockets than in a standard socket set, but everybody has a pipe wrench.
My WD hitch came with the used trailer when I bought it. I just slapped it on my truck and off I went. Then towed it with SWMBO's Acadia. Made all kinds of noise; creaking, moaning, and banging. Went online and read the manual. Made all the adjustments and it was like butter. If you're reading that someone's WD hitch makes noise I'll bet its not adjusted correctly.