Seeing most of us who own and ride ATV's also use them for getting into base hunting camps I thought this thread might be informative.
I am own my third design in the last 17 years. The perfect trailer would be all aluminum and the bed would be 48 inches long and 30 wide. The tongue would be 3 feet long as I find a longer tongue makes it easier to make extreme uphill or down hill departures and it also helps when trying to back up.
When I had my last trailer built I was unable to afford one of all aluminum so this is how it was built:
Size of the bed is 48 by 30 and the box is also 30 inches tall. The frame is square tubing steel and is reinforced at all corners. I had the frame designed so the box is removeable from it so I can use the trailer as a flat bed. On the corners on the frame I had my builder weld a 8 in piece of angle iron going up. These pieces hold a small piece of 2x4 that will slide in and convert it to a flat bed with ease. The wheels are designed so they sit on the outside of the bed to keep the center of mass center and as low as possible. I know you see a lot of trailers out there with the wheels close together and part of the bed on top of them but in my experience this is a invitation to flip your trailer the first time you side hill. Been there and done that, thank you.
In front of the tires I had a piece of metal welded to the frame at a 45 degree angle. These pieces help deflect trees and bushes from getting caught in the axles. My box is made of aluminum. I am guessing the total weight of the empty trailer is about 140 pounds. I believe I paid $900 to have the trailer built and that was about 2 years ago. Using an aluminum frame would of upped the price considerably. Wished now I would of done it.