Anti-Sway Hitch not so much weight distro

I use WD with built in sway with my Chevy dully 3500 long bed crew. I attempted to just moving the camper around the property without the bars and the back end of the truck dropped too much for my comfort level. I knew I had to keep the WD bars on if traveling on the road, even short distances.

I had a Reese (chain link) WD hitch I used on 3 different campers and several different tow vehicles and it worked very will with a simple Reese friction sway bar. Somewhere along the line, when we got our new Outback, the hitch head bent, causing the ball to lean backwards. I ended up getting an Equal-i-zer system to replace the 10 (plus) year old Reese. That Reese towed quite a few thousands of miles, so no complaints. Things just don't last forever.

For your set-up, I strongly suggest you re-evaluate your current hitch and WD system. For the size of your new truck, you should not have any problems with even a moderate system. Based upon your description, it sounds like you did not have the bars tight enough. Raising the bars by one or two links in the chain WILL make a big difference.

Before investing in a new WD system, try your old one. Make the chains tighter. Then if you still have problems, THEN look into a new system. I have a feeling your bars are simply not tight enough.

They all work if set up right. You might find with the WDH set up right you will not need the sway bar.

I already have one, but it is a cheap round-bar chain set-up with a single sway bar. Will this do the trick, or should I get something different. Kinda a pain to take the sway bar off every time I have to back up. Also, does it matter that I use an adapter to convert my 2.5" receiver to accommodate my 2" shank?

Yes you do.
You can tow without it but I guarantee it will handle better, bounce less and move around less with a proper WDH.
A friend of mine also has a Ram 3500 and bought a 7K# TT. Because it was his first trailer and he knows I've been towing so long, he took my word that he needed a wdh even though it towed home from the dealership OK.
He was shocked at the difference in ride it made to get the WDH set up. The truck was much more stable and needed less steering input. It also rode better. He could tell all this in a manner of a few blocks!
So yes, you should get one.