[tentcamper]

It is normal to feel and hear some of clunking from bumps. There is a little play in the ball/hitch connection. Also there is a little play in the hitch receiver 2" tube. As you hit the bumps and de-accelerate you will feel hear this. Also, some of it might be the brake controller not being adjusted it you got the clunking when braking and there is a very slight delay from the brakes.

You most likely don't need a WDH. But one of the advantage of a WDH is it keep a consent force on the hitch ball and the 2" receiver tube. You don't hear as much noise with a WDH. After you drive a hundred miles you will not notice it without a WDH. But when when spring comes each year you will notice the first out. If you op for a WDH all of them will resolve a lot of the clunking. But look for one rated in the range of your tongue weight. We just got the reese pro 600

Our first time out this year without a WDH. The DW was asking if everything was right because she had forgot the noise and feeling. But after a hundred miles or so she remembered it.