It isn’t that the springs are coils. It’s where they’re mounted.
I know it isn’t the answer you want to hear but I’d sell the truck and get any other that has conventional outboard-of-the-frame leaf springs.
That ‘14-up 2500 Ram narrow-mounted rear suspension is inherently unstable with tall loads.
In the mean time, put the biggest sway bar on it you can find, probably the Helwig, and some Rancho 9000 shocks dialed all the way up.
Or, forget the camper and keep pulling trailers. That truck is great for that.
And if the camper weight is coming from a sticker or plate on it anywhere, disregard that, go weight yourself on a truck scale. They’re never as light as the spec claims.
