We recently purchased a Swivel Wheel platform for our fifth wheel Silverback. Have been totally satisfied with it. Watch loading procedure to keep the weight spread out fairly even and from a towing standpoint, you don't even knbow it's back there. Even Backing up!
I highly recommend these to anyone trying to find an alternate to the toy hauler. We have pulled it about 2500 miles through varied terrain and have not had a single issue.
Installation really is easy for any welder or trailer shop. I would recommend the rear view camera just to keep an eye on it.
Currently have about 800lbs in tools and equipment on mine no problem. We are full timers but travel A LOT
and boondock whenever we can. Anyplace we can get the Silverback the swivel wheel goes no problem. We are hunters and keep a freezer with our game meat in it on there also and use a small Honda generator when we are boondocking. The swivel wheel makes a great place for the generator and freezer.