[Roo-B-Q'N]

I know health codes are different in every area, but what are some of the things the health inspectors look for when inspecting the trailers you are using to vend and or cater from.
We are gearing up for our first inspection and want to have our ducks in a row with what they will be looking for and at.
Also, what are they going to be looking at specifically in regards to the smokers?????
Any and all help would be appreciated. We are all for doing this correct and proper and do not want to "hide" anything from the inspector. He was a great help when we asked for his advice in the building of the trailer.