I made this for a buddy of mine for Xmas.. He's a big hunter and was tired of finding a spot in the woods or along the trail when heading to and from deer camp. Im sorry I dont have pictures for anything except the finished product.. its simple and it makes for a great conversation piece, while still flexing it purpose and functionality muscles as well

Step 1: Materials

you will need:
2" OD box (hollow square stock) -this is what slides into the Reese hitch reciever
(2x) 12" long, 1"channel or box stock
1 steel plate 1/4" thick 5" x 14"
1 toliet seat

Step 2: Welding and Final Assembly

Take the parts, and weld them together, I used 6013 Rods... they do a pretty good job for universal applications.
The channels that support the toliet seat may need to be adjust prior to welding since all toliet seats arent created equal.

once the frame is welded up, you will need to drill mounting holes in the plate, in this instance, I had to cut the top "lid" of the toliet off because It just wasnt feasible to leave it on.

Well thats pretty much it... now you have a toliet with suspension.. so you can really get into it (bouncing and stuff) its a strange sensation...