rear bumper weight capacity

I carry a 300 lbs dual sport on hitch rack frequently. Dunno particulars of your coach. I specifically bought mine as a 23u about 24 + feet on the e450 chassis to ensure I had enough. Bike causes rear end to sag..about 1/2 inch when jacked up on ultimatemx carrier. No big deal. Don't even know it's back there. Hitch says rated for 7500lbs. Set up and all maybe carrying 460 lbs.fuel can bolted to square sewer hose tube. Either a big ktm 625sxc or honda xr650r. Both are great do it all bikes. That said, I don't see extensions, nothing subpar holding on the hitch. I had seen weak stuff on some Chevy based class c in the rear. Again, dont know your equipment but works very well for me. Good luck