WDH or not?

I tow our Jayco 28RLS with our 2020 F250 on a 2.5” Curt solid ball mount, no sway control or WD. It wallers around a little bit with with passing trucks in a crosswind but nothing scary. With the 2010 F250, I use a Reese HP trunnion style WD hitch without SC for no other reason than to satisfy the rating of the hitch receiver. Tongue weight is 980~ lbs. Squats the rear of both trucks 2-1/4”. Front rises 3/8”.

https://www.amazon.com/CURT-45456-Commercial-Trailer-Receiver/dp/B00IIOBT9Q

I'd give it a shot and see how it does just on the ball. Your front axle will have plenty of weight on it with the diesel, more than a gas version of the truck with a WDH.

I would not use the sleeve except in a pinch. Get the 2.5" shank for the WDH or a 2.5" shank with just a ball or pintle hook as needed.
Generally a TT above 5,000 pounds is recommended to have weight distribution, your call. Do check the actual hitch rating as it may be limited if no weight distribution.

I bought my 3500 with a 5th wheel in mind, but pulled my 7,000 lb TT with it for a few months. Weight distribution was not needed, so I pulled with out it for a bit. I had never had issues with sway, but the trailer did move around a bit on some roads. I also noticed that on those same roads with frost heaves in places, there was a bit of porpoising, although nothing bad.

I set up my Equalizer with 4 point sway control, and the difference was definitely noticeable.

The step up from half ton to 3500 was a huge step up re towing experience, and the WDH with sway control was another step up. For the few minutes it took to hook up, The payback was worth it for me. I used it every time the trailer hit the road.

Sway can sneak up on you, and it's good to be proactive in my mind. You never need it until you do.

I would personally want sway control as a safety device with a trailer of that length, but YMMV. BTW, do you know if your old WDH is rated for the tongue weight of your new TT?

It's probably not strictly necessary but it's should give a better ride and the ball by itself won't address sway.

Get into a good cross wind or a road that gets bouncy and it's still a really nice addition.

Our tow vehicle can easily handle the tongue weight of our TT as well, don't actually need weight distribution, I use my WD/SC hitch faithfully for the sway control. Pretty windy where we do most of our RVing, add traveling at highway speeds, and sway control is what it is all about to achieve a comfortable towing experience. We can fly down the interstate and have no issues with sway even when passing commercial trucks, can't help not to love that rock solid feeling while underway.

There have been many instances where I see an HD truck that can easily handle their TT barely going 55mph, I notice as we pass them they don't have sway control or have an inferior WD/SC hitch that is not properly dialed in. We have a power tongue jack that takes less than a couple of minutes to remove/install our bars, great for when we are off road which is a lot as we prefer boondocking whenever possible. Without our WD/SC hitch we can get to where we are going, just not as relaxed when we get to our destination.

X2. Try pulling without a WDH.

It is a diesel

You don't say if your Ram is a diesel, which would add lots of weight to the front. The only way to know, is to give it a tow, no WDH, see what you think. Adding other things in the bed may effect outcome too??

Jerry