Good idea! I too am looking to plan my kitchen slide out and would love some ideas!
I was looking into a removable chuck box style:
Or one that slides out and is always attached to the trailer:
I am also looking into whether or not I am going to build a trailer to get into, or just one to carry gear. So that will dictate how I will do a number of things with the trailer.
I love this idea:
It is called a runaway trailer, and would be really easy to copy myself. A light yet usable trailer to pull around.