I'm planning to add one on my 321 as well. It has the same receiver. Only issue other than weight is bounce. Add one of those anti-rattle devices and you should be fine. I plan to carry firewood, small Honda generator and some extra diesel. Gets the weight off the rear axel of the truck which is my intent. I have a receiver on the front of my pick up and that's where my bike rack can go.
Just keep the total weight under 300 , eliminate the rattle and strap everything down well to get rid of cargo bounce.
I found s great cargo basket from Northern Tool with removable, folding side fences that looks great.
That's the advice I've gotten from a few service guys....
Me and my beautiful wife. Really close to retirement and can hardly wait!
2016 Eagle 321RSTS. MorRyde pin box. 12cu ft refer. Slide toppers and second awning.
2014 Silverado Duramax. Crew cab short box. Reese Titan 16K slider. Air bags.