Okay, here's the eyebolt installation sketch I promised:
All hardware is stainless--it costs more than plain steel, but in the very small quantities you need, the price difference doesn't amount to enough to worry about. The spacer is a piece of thick-walled aluminum tube but really could be almost anything un-rustable.
The point of the spacer in the "kitchen" portion of the sketch is to prevent squeezing the inner kitchen shell and the outer trailer shell together. Call me cautious.
I actually used acorn nuts on the inside to prevent having ugly threads visible--but I forgot that while I was drawing the picture.