I couldn't find any 3D models of this 1970s classic, so I measured my “new” trailer and modeled it for printing.
Just as the classic camping Boler trailer is made, this comes in two shells, top and bottom, along with a frame and wheels.
I've also made a solid whole piece, which is slotted to fit the thicker frame. This is a more durable option - for me it will be my keychain!
Print the hollow top at the weird angle shown to minimize supports.
The frame prints best upside down to eliminate supports.
The author marked this model as their own original creation.