I know what I would do. I would look for one of the old pickup bed trailers people make at home out of an old pickup bed and frame. I see them all the time for Couple hundred bucks. Then I would get me a good Bulldog hitch and weld it on. And a good heavy duty Jack that you use to raise or lower the tongue of the trailer and have that properly mounted with a heavy duty inflatable tire on bottom of jack. Now you have 3 tires. Depending how the camper is balanced you may even hook a big 4 wheeler on to it and raise the jack if you have enough weight in the back as not to over load the 4 wheeler with tongue weight. But this is a very versatile rough dolly, and its cheap and effective and safe. You can even pull it down the road if you want. I have seen these little home made trailers very cheap on craigslist.