Back in the 50's and 60's many of the popular diy magazines published many plans for these attractive little trailers. I think I have most of them in my files along with plans for many modern versions and loads of pictures.
If I am still here when/if I build one I will post much more on this, but for now I put together a 36 page pdf of pictures of mostly my favorite little design. This small teardrop does not require bottom or side materials longer than 8', so lacking any joints, you are insured of a tight seal against the elements. I also included some build pictures to peak your interest.
To download this 36 page pdf click Teardrop Trailer Photos. 2.4 MB - pdf
Way "COOL" cruising arrangement.
Hot little sleepers need flames ha, ha.