Click here. Three reviews on the bottom of the page. 2 are RV related. The one who was not happy is just dumb. Can't blame the carrier or the manufacture because they used it on a low profile vehicle with a receiver hitch close to the ground.
Here's a couple photos of mine I also purchased from TSC several years ago. The sides cage is removable, and the original configuration had a caged top for it too. I've used it with the cage and without. Unfortunately, TSC supply this model any more. They now have the aluminum colored version in the above link.
Here's a couple photos with the cage removed. I built this, very heavy wood frame, to transport our 3-wheeler. FYI, this worked absolutely great. I've been wanting to build a new one out of light weight aluminum I can just rest on top of the carrier, but the wooden one is working so well, I figure...why build another one when something works!
If you have a standard receiver hitch on your camper, anything with that has the same size shank will work. Just don't over extend the weight limit of the receiver hitch on the camper, considering it's factory installed.
Any of these will work:
Click here.