ORVs have heavy tongue weight once you're loaded up and ready to go, especially with the giant fresh water tank. You might run short on payload.
Coils are fine BTW. The 5-link control arms stabilize the axle better than leafs. But coils aren't as progressive as leafs, so to have a broad weight range, you either needs LONG coils (not practical out back) or you tune them for an expected "typical" load, at the expense of loads on either side of typical. Ram seems to have picked the low end of "typical" on the 1500s, so they squat pretty bad with a rated max load.