Do I need a WD Hitch

You might find that the EAZ-Lift hitch works fine. They're pretty popular. The bar type sway control may be all you need. The drawback is, you need to remember to remove the friction bar before backing into a spot requiring sharp turns to avoid overextending it and breaking it. I installed my Reese HP at home. Not a bad job but does require big sockets and torque wrench. My torque wrench goes to 250 ft/lbs so the ball isn't torqued to it's 450 ft/lbs. Went to 250 and then a breaker bar for a little more. The Equalizer would be about the same for me. I asked the dealer and he said they do the same. The Equalizer can be ordered with the ball pre-installed. I like that the Equalizer doesn't require drilling into the trailer's frame.