I have a small three rail dirt bike motorcycle trailer I bought used for about $500. I take off the rails when not using it for motorcycles and put a sheet of plywood on it (I think I cut it to 4x6).
When I take the camper off the truck, I drive the truck out, then roll the moto trailer under the camper, then lower the camper onto the trailer. I've marked the COG on the camper, so I know that I can put the COG just in front of the moto trailer axle. This gives me a tongue weight I can lift by hand, and keeps the trailer from tipping over backward. I then hook the trailer to my honda accord trailer hitch and back it into my driveway. It works GREAT! I use a dirt bike stand under the rear of the trailer, but you can also use a 4x4 or similar wood block. Then I crank up the front of the trailer until it's tight against the block/stand under the rear of the trailer. This makes it very steady and solid, so you can pop the top, get in and out, work on the camper or use it to sleep in.
I already had the moto trailer, but it works perfect for my needs. It's an option worth looking into, since you can buy them used for a few hundred bucks. Just make sure the rails are easy to remove.