The 195 concerns

With a 5th wheel, the pivot point is generally right above the rear axle (or close to it). Because of this the reverse reaction is way less, and it the trailer will tend to react to your steering inputs with substantially less over-reaction.

We have pulled our 179 both with and without the WDH (we have an E2). It pulls either way just fine, but I prefer the overall ride better with the WDH. It "feels" like we have a longer wheelbase on the entire rig.

Now I have to go do my research. Because of mostly using a fifth wheel towing setup, I got to relearn towing. As they say in doing internet research you have kept me from going down to many rabbit holes. 

The old rule of thumb to keep the tongue weight at least 10% of the total trailer weight to eliminate sway tendency is pretty accurate for rPods. There have been cases of sway getting out of control with lighter tongue weights than that range. So, I suggest loading up an weighing the trailer and tongue so you know what you really have. Personally, I won't go below 11%. On the 195 like on my 179 the lightest tongue weight will probably occur when you have full water in the gray tank but none in the fresh tank.  

Then add the suspenders to the belt. The friction based sway control on some of the combined wdh/sway control hitches won't work without the wdh tensioned, which you don't need. So, as StephenH says, one of the electronic sway control systems might be the best for you.