The potato gun would be a good option, but after doing something today (post pics tomorrow), I will need the tire carrier. Lucky for me my nieghbor is willing to help me build it. I am looking at something that attaches to the same place the tow hitch does and includes a tow hitch. I do not want the wieght of a full bumper, but want something strong and carry a couple of jerry cans as well.
In the design I do have a pin to hold the arm open. I am thinking of having a small fold down table if I can. I am going to try and keep the area in front of my rear view camera open. We will have to see. It might take some time to get this done as my nieghbor will be working me in.
TexGX